$ query “AS23028” --type=asn → 1 result(s)

AS23028 · TEAM-CYMRU

Team Cymru Inc.

AS23028 is owned by Team Cymru Inc. and is a residential access provider, established in the United States in 2002. The system announces a respectable 17 920 IPv4 addresses, and supports IPv6. Most of its address space is geolocated to the United States, with additional presence in Australia. Prefix announcements for this AS were recently updated.

Basic Information

Country
🇺🇸 United States
Category
Internet Service Provider
Network Role
Access Provider
Data Origin
Authoritative — Metadata from authoritative RIR registry (ARIN, RIPE, APNIC, etc.)
Registered
January 04, 2002
Last Changed
October 01, 2026
Last Seen
October 15, 2026 (active)

Prefix Summary

IPv4 Prefixes (raw / aggregated)
30 / 7
IPv6 Prefixes (raw / aggregated)
16 / 2
IPv4 Addresses
17 920
Largest IPv4 Prefix
/18 (16 384 addresses)
Largest IPv6 Prefix
/32
Geolocated Countries
🇺🇸 United States (17 664 IPs), 🇦🇺 Australia (256 IPs)
Prefix Changed
October 16, 2026

Reputation

Reputation
Pristine — 0 flagged IPs

Connectivity Summary

Upstream Providers
5 upstreams providing transit
Peers
632 networks exchanging traffic without transit
Downstream Customers
1 downstream buying transit
Unclassified
2 unclassified BGP neighbors
Degree
640 unique BGP neighbors
Reach
1 network in customer cone

Upstream Providers (5)

  • AS6939 — HURRICANE
  • AS6461 — ZAYO-6461 (Tier-1 transit)
  • AS3257 — GTT-BACKBONE (Tier-1 transit)
  • AS2914 — NTT-DATA-2914 (Tier-1 transit)
  • AS23352 — SERVERCENTRAL

Prefix Lists

IPv4 Prefixes (30 total)

  • 216.31.0.0/18 (16 384 addresses (/18 prefix))
  • 38.229.33.0/24 (256 addresses (/24 prefix))
  • 38.229.252.0/24 (256 addresses (/24 prefix))
  • 68.22.187.0/24 (256 addresses (/24 prefix))
  • 192.138.226.0/24 (256 addresses (/24 prefix))
  • 203.28.18.0/24 (256 addresses (/24 prefix))
  • 204.74.64.0/24 (256 addresses (/24 prefix))

IPv6 Prefixes (16 total)

  • 2604:8800::/32
  • 2620:0:6b0::/48