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ASN Lookup Tool
AS21687 AS21687

Powered By:
ASN Extended Info API & BGP Active Prefixes API
ASN Details
ASN
AS21687
Organisation
Crown Castle Fiber LLC
Name
AS21687
Total IPv4 Addresses
0
Total IPv4 Prefixes
0
Total IPv6 Prefixes
2
Total IPv4 Bogon Prefixes
0
Total IPv6 Bogon Prefixes
0
IPv4 Space Rank
Registry
Arin
Registered Country
US flag US
Registered Country Name
United States of America (the)
Registered Date
2001-06-08
Registration Last Change
2024-01-03
Receiving From

The list of active Autonomous Systems (ASs) which send traffic to that ASN.

ASN
Organisation
AS3356
US flagLevel 3 Parent, LLC
AS3257
US flagGTT Communications Inc.
AS6461
US flagZayo Bandwidth
AS1299
SE flagArelion Sweden AB
IPv6 Active Prefixes
Prefix2607:f7a8::/39
Range From2607:f7a8::
Range To2607:f7a8:1ff:ffff:ffff:ffff:ffff:ffff
Prefix2607:f7a8:1200::/39
Range From2607:f7a8:1200::
Range To2607:f7a8:13ff:ffff:ffff:ffff:ffff:ffff
Autonomous System (AS) is a network (or collection of networks) that are all managed and supervised by a single entity or organisation. This tool provides a comprehensive ownership and connectivity report for any given AS number.