AS12187 MTAHQ1 - Metropolitan Transportation Authority

🇺🇸

ARINassigned

Announced Prefixes (BGP)

16total

16 IPv40 IPv6

IPv4 Addresses

Allocated (RIR)0

Announced (BGP)23,808

IPv6 Addresses

Allocated (RIR)0

Announced (BGP)0

Prefix Limit (IPv4)

Prefix Limit (IPv6)

Country

RIR

Status

assigned

Allocated

1999-04-13

Announced Prefixes

(BGP)16

Prefix	RPKI	IRR	Last Seen
170.28.16.0/23	No ROA	Other IRR	2026-10-11
170.28.16.0/24	No ROA	-	2026-10-11
170.28.17.0/24	No ROA	-	2026-10-11
170.28.20.0/24	No ROA	-	2026-10-11
170.28.32.0/19	No ROA	-	2026-10-11
170.28.64.0/19	No ROA	-	2026-10-11
170.28.64.0/24	No ROA	-	2026-10-11
170.28.128.0/21	No ROA	-	2026-10-11
170.28.128.0/24	No ROA	-	2026-10-11
170.28.136.0/21	No ROA	-	2026-10-11

1-10 of 16

1 / 2

(seen in AS paths)

Networks AS12187 hands its own prefixes to: transit providers, or peers at an exchange.

ASPA

No ASPA

External Links

What is an ASN?Autonomous systems, ASN ranges and how they are assigned
RPKI and route origin validationWhat the RPKI badges on the prefix list mean
ASPA explainedWhy AS12187 should publish an ASPA object
IPv4 transfers in the ARIN regionMonthly volume and the latest registry transfers
ASN data in AI agents and SIEMMCP server and API integrations

API

Returns ASN details, announced prefixes, and BGP routing data.

curl -s "https://api.ipctl.io/v1/asn/12187" | jq