$ query “AS13977” --type=asn → 1 result(s)

AS13977 · CTELCO

Fidium

AS13977 is operated by Fidium and serves as a mid-size transit provider, registered in the United States since 2006. The system announces a solid 514 816 IPv4 addresses, including a /16, and supports IPv6. The bulk of its IP address space is in the United States. This AS's prefix announcements have been recently modified.

  • Top 5% — Top 5% of all autonomous systems by reach and degree

Basic Information

Country
🇺🇸 United States
Category
Internet Service Provider
Network Role
Mid-size Transit
Data Origin
Authoritative — Metadata from authoritative RIR registry (ARIN, RIPE, APNIC, etc.)
Registered
April 12, 2006
Last Changed
March 04, 2026
Last Seen
April 30, 2026 (active)

Prefix Summary

IPv4 Prefixes (raw / aggregated)
808 / 176
IPv6 Prefixes (raw / aggregated)
8 / 2
IPv4 Addresses
514 816
Largest IPv4 Prefix
/16 (65 536 addresses)
Largest IPv6 Prefix
/32
Geolocated Countries
🇺🇸 United States (630 304 IPs)
Prefix Changed
April 28, 2026

Reputation

Reputation
Good — 7 flagged IPs out of 514 816 total (0.00%)

Connectivity Summary

Upstream Providers
2 upstreams providing transit
Downstream Customers
50 downstreams buying transit
Degree
52 unique BGP neighbors
Reach
64 networks in customer cone

Upstream Providers (2)

  • AS174 — COGENT-174 (Tier-1 transit)
  • AS6461 — ZAYO-6461 (Tier-1 transit)

Prefix Lists

IPv4 Prefixes (808 total)

  • 70.8.0.0/16 (65 536 addresses (/16 prefix))
  • 163.252.0.0/16 (65 536 addresses (/16 prefix))
  • 64.222.128.0/17 (32 768 addresses (/17 prefix))
  • 69.53.0.0/17 (32 768 addresses (/17 prefix))
  • 216.212.0.0/17 (32 768 addresses (/17 prefix))
  • 71.169.128.0/18 (16 384 addresses (/18 prefix))
  • 64.223.64.0/18 (16 384 addresses (/18 prefix))
  • 64.222.96.0/19 (8 192 addresses (/19 prefix))
  • 72.73.64.0/19 (8 192 addresses (/19 prefix))
  • 70.105.224.0/19 (8 192 addresses (/19 prefix))
  • 70.109.128.0/19 (8 192 addresses (/19 prefix))
  • 70.20.32.0/19 (8 192 addresses (/19 prefix))
  • 72.95.96.0/19 (8 192 addresses (/19 prefix))
  • 71.173.64.0/19 (8 192 addresses (/19 prefix))
  • 72.92.128.0/19 (8 192 addresses (/19 prefix))
  • 71.161.192.0/19 (8 192 addresses (/19 prefix))
  • 71.255.128.0/19 (8 192 addresses (/19 prefix))
  • 72.65.96.0/19 (8 192 addresses (/19 prefix))
  • 71.241.128.0/20 (4 096 addresses (/20 prefix))
  • 71.254.96.0/20 (4 096 addresses (/20 prefix))
  • 71.161.80.0/20 (4 096 addresses (/20 prefix))
  • 70.109.176.0/20 (4 096 addresses (/20 prefix))
  • 72.71.224.0/20 (4 096 addresses (/20 prefix))
  • 72.71.208.0/20 (4 096 addresses (/20 prefix))
  • 64.223.160.0/20 (4 096 addresses (/20 prefix))
  • 71.181.16.0/20 (4 096 addresses (/20 prefix))
  • 70.16.192.0/20 (4 096 addresses (/20 prefix))
  • 71.241.192.0/20 (4 096 addresses (/20 prefix))
  • 72.73.112.0/20 (4 096 addresses (/20 prefix))
  • 71.254.0.0/20 (4 096 addresses (/20 prefix))
  • 64.223.208.0/20 (4 096 addresses (/20 prefix))
  • 64.223.224.0/20 (4 096 addresses (/20 prefix))
  • 71.181.72.0/21 (2 048 addresses (/21 prefix))
  • 71.181.40.0/21 (2 048 addresses (/21 prefix))
  • 71.168.96.0/21 (2 048 addresses (/21 prefix))
  • 71.241.216.0/21 (2 048 addresses (/21 prefix))
  • 64.222.64.0/21 (2 048 addresses (/21 prefix))
  • 71.161.112.0/21 (2 048 addresses (/21 prefix))
  • 71.161.104.0/21 (2 048 addresses (/21 prefix))
  • 71.168.80.0/21 (2 048 addresses (/21 prefix))
  • 72.73.96.0/21 (2 048 addresses (/21 prefix))
  • 71.181.104.0/21 (2 048 addresses (/21 prefix))
  • 68.238.56.0/21 (2 048 addresses (/21 prefix))
  • 72.87.56.0/21 (2 048 addresses (/21 prefix))
  • 72.95.88.0/21 (2 048 addresses (/21 prefix))
  • 71.168.120.0/21 (2 048 addresses (/21 prefix))
  • 71.181.80.0/21 (2 048 addresses (/21 prefix))
  • 70.109.168.0/21 (2 048 addresses (/21 prefix))
  • 70.16.72.0/21 (2 048 addresses (/21 prefix))
  • 70.16.96.0/21 (2 048 addresses (/21 prefix))
  • and 126 more

IPv6 Prefixes (8 total)

  • 2604:6e00::/32
  • 2620:2a:c000::/48