AS21687 AS21687 - Crown Castle Fiber LLC

🇺🇸

ARINassigned

Announced Prefixes (BGP)

3total

0 IPv43 IPv6

IPv4 Addresses

Allocated (RIR)0

Announced (BGP)0

IPv6 Addresses

Allocated (RIR)0

Announced (BGP)1.8×10²⁷

Prefix Limit (IPv4)

Prefix Limit (IPv6)

Country

RIR

Status

assigned

Allocated

2001-06-08

Announced Prefixes

(BGP)3

Prefix	RPKI	IRR	Last Seen
2607:f7a8::/39	No ROA	Other IRR	2026-10-11
2607:f7a8:c00::/39	No ROA	Other IRR	2026-10-11
2607:f7a8:1200::/39	No ROA	Other IRR	2026-10-11

(seen in AS paths)

Networks AS21687 hands its own prefixes to: transit providers, or peers at an exchange.

Registry transfers of AS21687 between organisations.

Date	Resource	From	To	Type
2026-06-01	AS21687	Crown Castle Fiber LLC 🇺🇸 US ARIN	Zayo Bandwidth 🇺🇸 US ARIN	M&A
2024-01-03	AS21687	HUDSON VALLEY DATANET, LLC 🇺🇸 US ARIN	Crown Castle Fiber LLC 🇺🇸 US ARIN	M&A

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 AS21687 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/21687" | jq