$ query “AS6461” --type=asn → 1 result(s)

AS6461 · MFNX

Zayo Group

AS6461 belongs to Zayo Group and is a Tier-1 transit provider, registered in the United States since 2002. The system announces an impressive 1.7 million IPv4 addresses, including a /15, and supports IPv6. Most of its address space is geolocated to the United States, with additional presence in the United Kingdom and Canada, and smaller footprints in 22 additional countries. Prefix announcements for this AS were recently updated.

  • Top 5% — Top 5% of all autonomous systems by reach and degree
  • #10 by Reach — Top 100 by customer cone size
  • #26 by Degree — Top 100 by unique BGP neighbor count
  • #7 in United States — Top 10 by reach within country

Basic Information

Country
🇺🇸 United States
Category
Internet Service Provider
Network Role
Tier-1 Transit
Data Origin
Authoritative — Metadata from authoritative RIR registry (ARIN, RIPE, APNIC, etc.)
Registered
August 23, 2002
Last Changed
May 10, 2026
Last Seen
June 22, 2026 (active)

Prefix Summary

IPv4 Prefixes (raw / aggregated)
215 / 173
IPv6 Prefixes (raw / aggregated)
16 / 12
IPv4 Addresses
1 747 712
Largest IPv4 Prefix
/15 (131 072 addresses)
Largest IPv6 Prefix
/29
Geolocated Countries
🇺🇸 United States (2 499 616 IPs), 🇬🇧 United Kingdom (92 752 IPs), 🇨🇦 Canada (24 400 IPs) and 22 more
Prefix Changed
June 21, 2026

Reputation

Reputation
Good — 7 flagged IPs out of 1 747 712 total (0.00%)

Connectivity Summary

Peers
451 networks exchanging traffic without transit
Downstream Customers
2 424 downstreams buying transit
Unclassified
65 unclassified BGP neighbors
Degree
2 940 unique BGP neighbors
Reach
58 468 networks in customer cone

Prefix Lists

IPv4 Prefixes (215 total)

  • 208.184.0.0/15 (131 072 addresses (/15 prefix))
  • 64.124.0.0/15 (131 072 addresses (/15 prefix))
  • 74.216.0.0/16 (65 536 addresses (/16 prefix))
  • 216.13.0.0/16 (65 536 addresses (/16 prefix))
  • 159.18.0.0/16 (65 536 addresses (/16 prefix))
  • 167.217.0.0/16 (65 536 addresses (/16 prefix))
  • 128.177.0.0/16 (65 536 addresses (/16 prefix))
  • 66.46.0.0/16 (65 536 addresses (/16 prefix))
  • 216.200.0.0/16 (65 536 addresses (/16 prefix))
  • 216.191.0.0/16 (65 536 addresses (/16 prefix))
  • 142.194.0.0/16 (65 536 addresses (/16 prefix))
  • 144.83.0.0/16 (65 536 addresses (/16 prefix))
  • 209.249.0.0/16 (65 536 addresses (/16 prefix))
  • 216.222.0.0/17 (32 768 addresses (/17 prefix))
  • 216.123.0.0/17 (32 768 addresses (/17 prefix))
  • 209.82.0.0/17 (32 768 addresses (/17 prefix))
  • 209.146.128.0/17 (32 768 addresses (/17 prefix))
  • 207.235.128.0/17 (32 768 addresses (/17 prefix))
  • 184.94.0.0/17 (32 768 addresses (/17 prefix))
  • 209.133.0.0/17 (32 768 addresses (/17 prefix))
  • 216.119.0.0/18 (16 384 addresses (/18 prefix))
  • 207.245.0.0/18 (16 384 addresses (/18 prefix))
  • 207.245.192.0/18 (16 384 addresses (/18 prefix))
  • 207.181.64.0/18 (16 384 addresses (/18 prefix))
  • 94.31.0.0/18 (16 384 addresses (/18 prefix))
  • 208.39.192.0/18 (16 384 addresses (/18 prefix))
  • 216.123.128.0/18 (16 384 addresses (/18 prefix))
  • 209.66.64.0/18 (16 384 addresses (/18 prefix))
  • 216.129.0.0/18 (16 384 addresses (/18 prefix))
  • 206.191.64.0/18 (16 384 addresses (/18 prefix))
  • 72.20.192.0/18 (16 384 addresses (/18 prefix))
  • 209.112.0.0/18 (16 384 addresses (/18 prefix))
  • 199.164.64.0/18 (16 384 addresses (/18 prefix))
  • 209.153.192.0/18 (16 384 addresses (/18 prefix))
  • 31.99.0.0/18 (16 384 addresses (/18 prefix))
  • 67.208.224.0/19 (8 192 addresses (/19 prefix))
  • 207.230.224.0/19 (8 192 addresses (/19 prefix))
  • 199.212.160.0/19 (8 192 addresses (/19 prefix))
  • 209.221.32.0/19 (8 192 addresses (/19 prefix))
  • 216.235.128.0/19 (8 192 addresses (/19 prefix))
  • 209.82.160.0/19 (8 192 addresses (/19 prefix))
  • 72.10.64.0/19 (8 192 addresses (/19 prefix))
  • 204.128.64.0/19 (8 192 addresses (/19 prefix))
  • 71.19.160.0/19 (8 192 addresses (/19 prefix))
  • 213.152.224.0/19 (8 192 addresses (/19 prefix))
  • 216.157.192.0/19 (8 192 addresses (/19 prefix))
  • 213.161.64.0/19 (8 192 addresses (/19 prefix))
  • 216.129.64.0/19 (8 192 addresses (/19 prefix))
  • 216.23.128.0/19 (8 192 addresses (/19 prefix))
  • 66.213.128.0/19 (8 192 addresses (/19 prefix))

IPv6 Prefixes (16 total)

  • 2a0b:7ec0::/29
  • 2001:438::/32
  • 2001:4c8::/32
  • 2604:e500::/32
  • 2a00:16f8::/32
  • 2602:fdbe::/36
  • 2001:df0:7c80::/48
  • 2001:1b70:b3::/48
  • 2602:807:400c::/48
  • 2604:b040:b::/48
  • 2607:c200:1106::/48
  • 2800:870:1002::/48