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1115 Willoughby Avenue, Brooklyn, NY 11237

BBL 3031970051 (Borough 3, Block 3197, Lot 51) · BIN 3072750 · Last updated:

Summary · as of October 31, 2026

1115 Willoughby Avenue (Brooklyn, NY 11237; tax lot BBL 3031970051) is a 6-unit walk-up apartment building (building class C2: walk-up apartments, five or six families), built around 1931, on a 2,500 sq ft lot zoned R6. City tax records list the owner as INK ACQUISITION LLC; per ACRIS, a deed to this owner dated November 19, 2014 lists a price of $1,100,000. The Department of Finance's final market value for tax year 2027 is $1,082,000. As of October 31, 2026, NYC Open Data shows two DOB jobs with a permit issued but no sign-off, two active ECB violations, eight open HPD violations and nine OATH tickets with an unpaid balance. There was one 311 request in the past 12 months and 15 HPD complaints since 2019. (Source: NYC Open Data — DOB, HPD, OATH, DOF, DCP and ACRIS datasets — compiled by NYC Property Facts.)

Owner of record
INK ACQUISITION LLC
Building class
C2 · Walk-up apartments, five or six families
Year built · units
1931 · 6 res.
Lot area · zoning
2,500 sq ft · R6
Market value (DOF)
$1,082,000 FY2027
Last priced deed
$1,100,000 · 2014-11-19
BBL
3031970051
BIN
3072750

How to cite: NYC Property Facts, “1115 Willoughby Avenue, Brooklyn, NY 11237 (BBL 3031970051)”, data as of 2026-10-31, https://nycpropertyfacts.com/ny/brooklyn/1115-willoughby-avenue-3031970051. Source: NYC Open Data.

Lot & building

Basic facts about the tax lot and building from the city’s PLUTO database.

Owner (as listed by the city)
INK ACQUISITION LLCThe owner name on the city’s tax records. It can lag behind recent sales and is often an LLC.
Building class
C2 – Walk-up apartments, five or six familiesThe Department of Finance’s category for what kind of building this is.
Land use
Multi-family walk-up buildingsCity Planning’s broad category of how the lot is used.
Year built
1931Often an estimate for older buildings.
Floors
3
Units
6 residential / 6 totalResidential units are apartments; total includes stores and offices.
Buildings on lot
1
Lot size
2,500 sq ft (25 ft × 100 ft)
Building floor area
4,350 sq ft
Zoning
R6The zoning district sets what can be built and used here. Residential district.
Built vs. allowed density (FAR)
1.74 built / 2.43 max residentialFloor Area Ratio = building floor area ÷ lot area. If built FAR is below the maximum, zoning may allow more floor area (other rules apply).
Identifiers
BBL 3031970051 (Borough 3, Block 3197, Lot 51) · BIN 3072750BBL identifies the tax lot; BIN identifies each building (from DOB/HPD/footprint records).

Source: PLUTO (Dept. of City Planning) — city dataset updated 2026-08-24; data as of 2026-10-31; Building Footprints — city dataset updated 2026-10-25; data as of 2026-10-31

Tax assessment

How the Department of Finance values this lot for property tax.

Market value (tax year 2027, final roll)
$1,082,000The Department of Finance’s estimate of value for tax purposes. It is not an appraisal and is often far from the sale price.
Assessed value
$486,900The portion of market value that taxes are calculated on (capped by law for small homes).
Taxable value (final)
$81,571Assessed value minus any exemptions.
Tax class
Tax class 2A – residential rental, 4–6 units
Tax yearRollMarket valueAssessed valueTax class
2027Final$1,082,000$486,9002A
2026Final$902,000$405,9002A
2025Final$1,128,000$507,6002A

Source: DOF Property Valuation and Assessment Data — city dataset updated 2026-09-14; data as of 2026-10-31

Sales & deed history 5

Deeds recorded with the City Register (ACRIS). A deed transfers ownership. A $0 or very low price usually means a transfer between related parties, an estate, or a refinance-related transfer, not a market sale. This is not a title search; mortgages, liens and other documents are not shown.

DateTypePriceSeller (grantor)Buyer (grantee)Doc ID
2014-11-19DEED$1,100,000Aspire Enterprise IncInk Acquisition Llc; Ink 1115 Llc2014120100358001
1996-03-03DEED$0 / not statedRovito, Rosaria; Rovito, Joseph; Rovito, GiuseppeAspire Enterprise IncFT_3870005548187
1980-05-12DEED$0 / not statedSereno Salvatore; Sereno SilviaRovito Rosaria; Rovito GiuseppeBK_8030115900377
1971-12-20DEED$0 / not statedSereno Salvatore; Prestigiacomo AntoninoSereno Silvia; Sereno SalvatoreBK_7130052601813
1971-09-02DEED$0 / not statedBuscemi Vincent; Buscemi FilomenaPrestigiacomo Antonino; Sereno SalvatoreBK_7130050500425

Source: ACRIS Real Property Master — city dataset updated 2026-10-08; data as of 2026-10-31; ACRIS Real Property Legals — city dataset updated 2026-10-08; data as of 2026-10-31; ACRIS Real Property Parties — city dataset updated 2026-10-08; data as of 2026-10-31

DOB job filings 2 open of 2

A “job” is an application to the Department of Buildings to do construction work. A job marked Permitted, not signed off had a work permit issued but the city has no record of final sign-off (inspection/completion). Old jobs left in this state are common and appear in buyer and lender due diligence; the work may or may not have been done.

StatusJob #TypeFiledEst. cost
Permitted, not signed off
PERMIT ISSUED - ENTIRE JOB/WORK · 2015-11-05
321174545
BIS
A2 – Alteration with multiple work types (no change to use/occupancy)2015-07-27$80,000
Permitted, not signed off
PERMIT ISSUED - ENTIRE JOB/WORK · 2015-06-16
321145792
BIS
A2 – Alteration with multiple work types (no change to use/occupancy)2015-06-11$70,000

Source: DOB NOW: Build – Job Application Filings — city dataset updated 2026-10-30; data as of 2026-10-31; DOB Job Application Filings (BIS) — city dataset updated 2026-10-30; data as of 2026-10-31

Work permits 6

Individual permits issued under DOB jobs (one job can have several permits, e.g. plumbing and construction). Permit expiration alone does not mean the job was completed or signed off.

IssuedExpiresJob #WorkPermit status
2015-11-052016-11-04321174545
BIS
Plumbing / PlumbingISSUED (initial)
2015-08-252016-08-18321174545
BIS
Equipment work / Mechanical/HVACISSUED (renewal)
2015-08-032015-08-18321174545
BIS
Equipment work / Mechanical/HVACISSUED (initial)
2015-07-272015-08-18321174545
BIS
Equipment work / Other / general constructionISSUED (initial)
2015-06-162016-06-15321145792
BIS
Plumbing / PlumbingISSUED (initial)
2015-06-112015-08-18321145792
BIS
Equipment work / Other / general constructionISSUED (initial)

Source: DOB NOW: Build – Approved Permits — city dataset updated 2026-10-30; data as of 2026-10-31; DOB Permit Issuance (BIS) — city dataset updated 2026-10-31; data as of 2026-10-31

DOB violations 0 active of 2

Violations issued by the Department of Buildings for building-code or zoning conditions. Active means DOB has not recorded the violation as resolved or dismissed. Many active DOB violations are old (e.g. elevator or boiler inspection paperwork).

StatusIssuedTypeDescriptionNumber
Resolved/dismissed
V*-DOB VIOLATION - DISMISSED
2016-04-29C-CONSTRUCTION OTHER OPTIONALV*042916C0412MC
Resolved/dismissed
V*-DOB VIOLATION - DISMISSED
1998-05-04LL6291-LOCAL LAW 62/91 - BOILERS BOILER REQUIREDV*050498LL629117891

Source: DOB Violations — city dataset updated 2026-10-31; data as of 2026-10-31

ECB violations (DOB) 2 active of 2

DOB violations that go to a hearing at OATH (formerly the Environmental Control Board) and can carry fines. Active means the condition has not been certified as corrected and/or the case is not resolved. A balance due is a fine the city says is unpaid.

StatusIssuedSeverityWhat it was forPenalty / paid / balanceECB #
Active
DEFAULT · NO COMPLIANCE RECORDED
2019-02-20CLASS - 2OCCUPANCY CONTRARY TO THAT ALLOWED BY THE C OF O AND DEPARTMENT OF BUILDINGS RECORDS.FLOOR PIERCED WITH METAL SPIRAL STAIRS INSTALLED AT 1ST STORY APARTMENT 1R LEADING DOWN TO CELLAR CREATING ILLEGAL DUPLEX$6,250 / $0 / $6,25035243529Y
Active
IN VIOLATION · NO COMPLIANCE RECORDED
2000-05-25Hazardous4A,FRESH AIR VENT CLOGGED$0 / $0 / $032018800M

Source: DOB ECB Violations — city dataset updated 2026-10-31; data as of 2026-10-31

OATH tickets (all agencies) 9 unpaid of 27

Summonses heard at the Office of Administrative Trials and Hearings, from agencies like Sanitation, Buildings, Fire and Health, linked to this lot’s block and lot. Default means the respondent did not appear at the hearing, which typically results in the maximum penalty. Tickets may be issued to tenants or businesses at the address, not just the owner. DOB ECB tickets appear here too.

StatusDateAgencyChargeRespondentImposed / paid / balanceTicket #
Unpaid balance Default
DOCKETED · DEFAULTED
2025-05-08Sanitation OthersFAILURE TO CLEAN 18 INCHES INTO STREETINK ACQUISITION LLC$300 / $0 / $300049127970P
Unpaid balance Default
DOCKETED · DEFAULTED
2025-02-26Dos - Enforcement AgentsNON-RECYC LEFT IN RECYC CONTAINER FOR COLLECTION 1TO8 DWELLING UNITSINK ACQUISITION LLC$25 / $0 / $25048791885J
Unpaid balance Default
DOCKETED · DEFAULTED
2025-02-14Sanitation OthersFAILURE TO CLEAN 18 INCHES INTO STREETINK ACQUISITION LLC$300 / $0 / $300048963062R
Unpaid balance Default
DOCKETED · DEFAULTED
2024-11-08Sanitation OthersDIRTY SIDEWALKINK ACQUISITION LLC$300 / $0 / $300048722275N
Unpaid balance Default
DOCKETED · DEFAULTED
2024-09-11Sanitation RecyclingDIRTY SIDEWALKINK ACQUISITION LLC$300 / $0 / $300047035041J
Unpaid balance Default
DOCKETED · DEFAULTED
2024-06-05Sanitation OthersFAILURE TO CLEAN 18 INCHES INTO STREETINK ACQUISITION LLC$300 / $0 / $300048442668H
Unpaid balance
HEARING COMPLETED · IN VIOLATION
2023-04-25Pcs - DohmhFAIL TO ELIMINATE RODENT INFESTATION SHOWN BY ACTIVE RODENT SIGNS 1ST1115 LLC$300 / $0 / $3000802639146
Unpaid balance Default
DEFAULTED · DEFAULTED
2022-03-28Pcs - DohmhFAIL TO ELIMINATE RODENT INFESTATION SHOWN BY ACTIVE RODENT SIGNS 1STC O EDEN ASHOURZADEH$600 / $0 / $6000802218570
Unpaid balance Default
DOCKETED · DEFAULTED
2019-02-20Dept. Of BuildingsOCCUPANCY CONTRARY TO THAT ALLOWED BY CERT OF OCCUP OR BUILDING DEPTORTIZ$6,250 / $0 / $6,250035243529Y
Hearing pending
NEW ISSUANCE
2026-10-14Pcs - DohmhFAIL TO ELIMINATE RODENT INFESTATION SHOWN BY ACTIVE RODENT SIGNS 1STLLC$300 / $0 / $3000804006419
No balance due
PAID IN FULL
2023-01-25Dos - Enforcement AgentsSTORAGE OF RECEPTACLES 1ST OCCURRENCEINK ACQUISITION LLC$50 / $50 / $0047724590X
No balance due
PAID IN FULL
2021-05-12Pcs - DohmhFAIL TO ELIMINATE RODENT INFESTATION SHOWN BY ACTIVE RODENT SIGNS 1STC O MANAGEMENT$300 / $300 / $00801969439

Showing 12 of 27 records. The API and the source dataset have the full list.

Source: OATH Hearings Division Case Status — city dataset updated 2026-10-31; data as of 2026-10-31

HPD registration & contacts

Owners of most rental buildings must register with the Department of Housing Preservation and Development each year and list an owner and managing agent.

HPD building ID
396126
Last registered
2026-07-13
Registration valid until
2027-09-01 CurrentRegistrations must be renewed every year.
RoleNameCompanyBusiness city
ShareholderAlex KahenNew York, Ny
SitemanagerEden Ashourzadeh
ShareholderEden AshourzadehNew York, Ny
AgentEden Ashourzadeh1115 WILL LLCNew York, Ny
HeadofficerEden AshourzadehNew York, Ny
Corporateowner1115 WILL LLCNew York, Ny

Source: HPD Multiple Dwelling Registrations — city dataset updated 2026-10-28; data as of 2026-10-31; HPD Registration Contacts — city dataset updated 2026-10-28; data as of 2026-10-31

HPD housing-code violations 8 open of 24

Violations HPD inspectors issued for conditions in residential buildings (heat, leaks, mold, pests, lead paint, etc.). Class letters show how serious: Class A – non-hazardous (HPD gives 90 days to correct); Class B – hazardous (30 days to correct); Class C – immediately hazardous (24 hours to correct for most conditions); Class I – information / order (e.g. orders to register, lead or other administrative orders). Open means HPD has not recorded the condition as corrected.

StatusClassIssuedAptCondition
Open
Defect Letter Issued · 2025-07-01
B2025-01-241L§ 27-2017.3 HMC: TRACE AND REPAIR THE SOURCE AND ABATE THE VISIBLE MOLD CONDITION... LESS THAN 6 SQ FT AT CEILING IN THE 2nd BATHROOM FROM EAST LOCATED AT APT 1L, 1st STORY, 1st APARTMENT FROM EAST AT SOUTH ORIGINAL VIOLATION 17209660 ISSUED 21-AUG-24 HAS BEEN
Open
Nov Sent Out · 2024-09-26
A2024-09-261L§ 27-2065 ADM CODE PROVIDE VENTILATION FOR WATER CLOSET COMPARTMENT AND/OR BATHROOM AND FILE APPLICATION FOR APPROVAL BEFORE DOING WORK . IN THE 2nd BATHROOM FROM EAST LOCATED AT APT 1L, 1st STORY, 1st APARTMENT FROM EAST AT SOUTH
Open
Nov Sent Out · 2024-09-26
A2024-09-261L§ 27-2065 ADM CODE PROVIDE VENTILATION FOR WATER CLOSET COMPARTMENT AND/OR BATHROOM AND FILE APPLICATION FOR APPROVAL BEFORE DOING WORK . IN THE 1st BATHROOM FROM EAST LOCATED AT APT 1L, 1st STORY, 1st APARTMENT FROM EAST AT SOUTH
Open
First No Access To Re- Inspect Violation · 2019-05-11
B2019-02-26§ 27-2077 ADM CODE DISCONTINUE THE ROOMING UNIT (NORTH 3 ROOM ) AT CELLAR, OF ILLEGAL DUPLEX APARTMENT USE IN CONJUNCTION WITH APT 1R , 1ST FLOOR, NORTH APARTMENT
Open
First No Access To Re- Inspect Violation · 2019-05-11
B2019-02-26§ 27-2077 ADM CODE DISCONTINUE THE ROOMING UNIT (NORTH 1 ROOM ) AT CELLAR, OF ILLEGAL DUPLEX APARTMENT USE IN CONJUNCTION WITH APT 1R , 1ST FLOOR, NORTH APARTMENT
Open
Nov Sent Out · 2019-02-26
A2019-02-261R§ 300 M/D LAW FILE PLANS AND APPLICATION AND LEGALIZE THE FOLLOWING ALTERATION OR RESTORE TO THE LEGAL CONDITION EXISTING PRIOR TO THE MAKING OF SAID ALTERATION FLOOR PIERCED WITH METAL SPIRAL STAIRS ERECTED LEADING TO CELLAR, CREATING DUPLEX APARTMENT LOCATED
Open
First No Access To Re- Inspect Violation · 2019-05-11
B2019-02-26§ 27-2081 ADM CODE DISCONTINUE USE OF ROOMS FOR LIVING, DISCONNECT PLUMBING FIXTURES AND PROPERLY SEAL PIPE CONNECTIONS BATHROOM ( SHOWER STALL, WATERCLOSET, AND WASHBASIN) AT CELLAR OF DUPLEX APARTMENT USE INCONJUNCTION WITH 1ST STORY APARTMENT 1R, APARTMENT
Open
Not Complied With · 2019-04-05
C2019-02-04§ 27-2033 ADM CODE PROVIDE READY ACCESS TO BUILDINGS HEATING SYSTEM BOILER ROOM DOOR LOCKED AT CELLAR
Closed
Violation Dismissed · 2024-12-11
A2024-09-261L§ 27-2026, 2027 HMC: PROPERLY REPAIR THE SOURCE AND ABATE THE EVIDENCE OF A WATER LEAK AT CEILING IN THE 2nd BATHROOM FROM EAST LOCATED AT APT 1L, 1st STORY, 1st APARTMENT FROM EAST AT SOUTH
Closed
Violation Closed · 2025-01-24
A2024-09-261L§ 27-2017.3 HMC: TRACE AND REPAIR THE SOURCE AND ABATE THE VISIBLE MOLD CONDITION... LESS THAN 6 SQ FT AT CEILING IN THE 2nd BATHROOM FROM EAST LOCATED AT APT 1L, 1st STORY, 1st APARTMENT FROM EAST AT SOUTH
Closed
Violation Dismissed · 2024-12-11
A2024-09-261L§ 27-2005 ADM CODE REPAIR THE BROKEN OR DEFECTIVE PLASTERED SURFACES AND PAINT IN A UNIFORM COLOR AT CEILING IN THE 2nd BATHROOM FROM EAST LOCATED AT APT 1L, 1st STORY, 1st APARTMENT FROM EAST AT SOUTH
Closed
Violation Dismissed · 2022-03-29
A2021-09-30§ 27-2045 ADM CODE POST A PROPER NOTICE OF SMOKE DETECTOR REQUIREMENTS, IN A FORM APPROVED BY THE COMMISSIONER, AT OR NEAR THE MAIL BOX MISSING AT PUBLIC HALL, 1st STORY
Closed
Violation Dismissed · 2019-05-29
B2019-02-261R§ 27-2024 ADM CODE PROVIDE ADEQUATE SUPPLY OF HOT WATER FOR THE FIXTURES , IN THE 2nd BATHROOM FROM NORTH AT EAST LOCATED AT APT 1R, 1st STORY, APARTMENT AT NORTH
Closed
Violation Dismissed · 2019-05-29
B2019-02-261R§ 27-2046.1 HMC: REPAIR OR REPLACE THE CARBON MONOXIDE DETECTING DEVICE(S). MISSING LOCATED AT APT 1R, 1st STORY, APARTMENT AT NORTH
Closed
Violation Dismissed · 2019-05-13
C2019-02-261R§ 27-2005 ADM CODE & 309 M/D LAW ABATE THE NUISANCE CONSISTING OF HOTWATER EXCEEDING THE MAXIMUM TEMPERATURE OF 130 DEGREES AT ALL HOTWATER FIXTURES IN THE KITCHEN LOCATED AT APT 1R, 1st STORY, APARTMENT AT NORTH
Closed
Violation Closed · 2019-03-16
C2019-02-111R§ 27-2024 ADM CODE PROVIDE ADEQUATE SUPPLY OF HOT WATER FOR THE FIXTURES AT WASH BASIN, IN THE BATHROOM LOCATED AT APT 1R, 1st STORY, 1st APARTMENT FROM WEST AT NORTH
Closed
Violation Dismissed · 2019-04-25
C2019-02-041R§ 27-2005 ADM CODE & 309 M/D LAW ABATE THE NUISANCE CONSISTING OF 139 DEGREES EXTREMELY HOTWATER EXCEEDING THE MAXIMUM ALLOWABLE AMOUNT OF 130 DEGREES IN THE KITCHEN LOCATED AT APT 1R, 1st STORY, APARTMENT AT NORTH
Closed
Violation Dismissed · 2019-04-25
C2019-02-041R§ 27-2024 ADM CODE PROVIDE ADEQUATE SUPPLY OF COLD WATER FOR THE FIXTURES AT THE WASH BASIN IN THE 1st BATHROOM FROM NORTH LOCATED AT APT 1R, 1st STORY, APARTMENT AT NORTH
Closed
Violation Closed · 2019-04-02
C2019-02-041R§ 27-2029 ADM CODE PROVIDE AN ADEQUATE SUPPLY OF HEAT FOR THE APARTMENT IN THE ENTIRE APARTMENT LOCATED AT APT 1R, 1st STORY, APARTMENT AT NORTH
Closed
Violation Dismissed · 2019-05-08
B2019-02-041R§ 27-2024 ADM CODE PROVIDE ADEQUATE SUPPLY OF HOT WATER FOR THE FIXTURES AT THE WASH BASIN IN THE 2nd BATHROOM FROM NORTH LOCATED AT APT 1R, 1st STORY, APARTMENT AT NORTH

Showing 20 of 24 records — open violations are listed first; the API lists every one. The API and the source dataset have the full list.

Source: HPD Housing Maintenance Code Violations — city dataset updated 2026-10-31; data as of 2026-10-31

HPD complaints 15

Complaints tenants or others made to HPD (usually via 311) about housing conditions, from 2019 onward. A complaint is not a violation; HPD may inspect and issue one.

ReceivedStatusAptProblem(s)Outcome
2024-05-10CLOSE1LGeneral – Ventilation SystemThe Department of Housing Preservation and Development inspected the following conditions. No violations were issued. The complaint has been closed.
2021-10-02CLOSE2LHeat/Hot Water – Apartment OnlyThe Department of Housing Preservation and Development contacted an occupant of the apartment and verified that the following conditions were corrected. The complaint has been closed. If the condition
2021-09-21CLOSE1RUnsanitary Condition – Mold
Unsanitary Condition – Pests
Water Leak – Heavy Flow
Plumbing – Basin/Sink
Water Leak – Slow Leak
Unsanitary Condition – Sewage
The Department of Housing Preservation and Development inspected the following conditions. No violations were issued. The complaint has been closed.
2019-02-19CLOSE1RHeat/Hot Water – Entire BuildingThe Department of Housing Preservation and Development inspected the following conditions. No violations were issued. The complaint has been closed.
2019-02-01CLOSE1RHeat/Hot Water – Entire BuildingMore than one complaint was received for this building-wide condition. This complaint status is for the initial complaint.The Department of Housing Preservation and Development contacted an occupant o
2019-02-01CLOSE1RPlumbing – Water SupplyThe Department of Housing Preservation and Development inspected the following conditions. No violations were issued. The complaint has been closed.
2019-02-01CLOSEBLDGHeat/Hot Water – Entire BuildingMore than one complaint was received for this building-wide condition. This complaint status is for the initial complaint.The Department of Housing Preservation and Development contacted a tenant in t
2019-02-01CLOSE1LPlumbing – Basin/Sink
Appliance – Electric/Gas Range
Electric – No Lighting
General – Cooking Gas
Heat/Hot Water – Entire Building
Electric – Power Outage
Paint/Plaster – Wall
The Department of Housing Preservation and Development was not able to gain access to inspect the following conditions. The complaint has been closed. If the condition still exists, please file a new
2019-01-31CLOSEBLDGHeat/Hot Water – Entire BuildingMore than one complaint was received for this building-wide condition. This complaint status is for the initial complaint.The Department of Housing Preservation and Development contacted a tenant in t
2019-01-30CLOSE1LHeat/Hot Water – Apartment OnlyThe Department of Housing Preservation and Development was not able to gain access to your apartment or others in the building to inspect for a lack of heat or hot water. The complaint has been closed

Showing 10 of 15 records. The API and the source dataset have the full list.

Source: HPD Housing Maintenance Code Complaints and Problems — city dataset updated 2026-10-31; data as of 2026-10-31

311 requests (last 12 months) 1

Recent 311 service requests the city geocoded to this lot: noise, illegal parking, heat, sanitation and more. Anyone can file them, so they describe activity at or near the address, not necessarily the building itself.

OpenedAgencyComplaintStatusClosed
2026-05-09NYPDNoise - Residential – Loud Music/PartyClosed2026-05-09

Source: 311 Service Requests from 2020 to Present — city dataset updated 2026-10-31; data as of 2026-10-31

Nearby properties

On Willoughby Ave

Same tax block (3197)

All properties on Willoughby Ave, Brooklyn · All of Brooklyn 11237 (Bushwick (West))

Open-item counts as of October 31, 2026; each section lists its own dataset date. Machine-readable: JSON API · Markdown · API & MCP docs