$ query “AS12129” --type=asn → 1 result(s)

AS12129 · 123NET

123.Net Inc.

AS12129 belongs to 123.Net Inc. and is a major transit provider, based in the United States since 1999. The system announces a solid 165 888 IPv4 addresses, 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
  • Pioneer — Registered before the year 2000

Basic Information

Country
🇺🇸 United States
Category
Internet Service Provider
Network Role
Major Transit
Data Origin
Authoritative — Metadata from authoritative RIR registry (ARIN, RIPE, APNIC, etc.)
Registered
March 30, 1999
Last Changed
March 04, 2026
Last Seen
September 11, 2026 (active)

Prefix Summary

IPv4 Prefixes (raw / aggregated)
48 / 33
IPv6 Prefixes (raw / aggregated)
4 / 3
IPv4 Addresses
165 888
Largest IPv4 Prefix
/17 (32 768 addresses)
Largest IPv6 Prefix
/32
Geolocated Countries
🇺🇸 United States (190 720 IPs)
Prefix Changed
September 12, 2026

Reputation

Reputation
Good — 1 flagged IPs out of 165 888 total (0.00%)

Connectivity Summary

Upstream Providers
9 upstreams providing transit
Peers
20 networks exchanging traffic without transit
Downstream Customers
96 downstreams buying transit
Unclassified
1 unclassified BGP neighbor
Degree
126 unique BGP neighbors
Reach
146 networks in customer cone

Upstream Providers (9)

  • AS6939 — HURRICANE
  • AS174 — COGENT (Tier-1 transit)
  • AS3356 — LEVEL3 (Tier-1 transit)
  • AS6461 — MFNX (Tier-1 transit)
  • AS1299 — TWELVE99 (Tier-1 transit)
  • AS3257 — GTT-BACKBONE (Tier-1 transit)
  • AS2914 — NTT-DATA-2914 (Tier-1 transit)
  • AS6453 — AS6453 (Tier-1 transit)
  • AS396998 — PATH-NETWORK

Prefix Lists

IPv4 Prefixes (48 total)

  • 152.160.0.0/17 (32 768 addresses (/17 prefix))
  • 207.91.192.0/18 (16 384 addresses (/18 prefix))
  • 152.160.128.0/18 (16 384 addresses (/18 prefix))
  • 65.183.160.0/19 (8 192 addresses (/19 prefix))
  • 66.103.224.0/19 (8 192 addresses (/19 prefix))
  • 216.234.96.0/19 (8 192 addresses (/19 prefix))
  • 74.126.0.0/19 (8 192 addresses (/19 prefix))
  • 69.39.64.0/19 (8 192 addresses (/19 prefix))
  • 209.124.32.0/19 (8 192 addresses (/19 prefix))
  • 209.131.0.0/19 (8 192 addresses (/19 prefix))
  • 216.150.224.0/20 (4 096 addresses (/20 prefix))
  • 67.214.112.0/20 (4 096 addresses (/20 prefix))
  • 192.96.208.0/20 (4 096 addresses (/20 prefix))
  • 216.109.192.0/20 (4 096 addresses (/20 prefix))
  • 209.103.128.0/20 (4 096 addresses (/20 prefix))
  • 66.51.144.0/20 (4 096 addresses (/20 prefix))
  • 205.251.176.0/20 (4 096 addresses (/20 prefix))
  • 204.232.80.0/20 (4 096 addresses (/20 prefix))
  • 199.249.0.0/21 (2 048 addresses (/21 prefix))
  • 130.51.212.0/22 (1 024 addresses (/22 prefix))
  • 199.167.252.0/22 (1 024 addresses (/22 prefix))
  • 130.44.28.0/22 (1 024 addresses (/22 prefix))
  • 198.3.44.0/22 (1 024 addresses (/22 prefix))
  • 199.231.52.0/22 (1 024 addresses (/22 prefix))
  • 192.159.68.0/23 (512 addresses (/23 prefix))
  • 69.54.68.0/23 (512 addresses (/23 prefix))
  • 199.33.234.0/23 (512 addresses (/23 prefix))
  • 208.86.112.0/24 (256 addresses (/24 prefix))
  • 192.153.192.0/24 (256 addresses (/24 prefix))
  • 192.149.240.0/24 (256 addresses (/24 prefix))
  • 149.19.205.0/24 (256 addresses (/24 prefix))
  • 198.153.129.0/24 (256 addresses (/24 prefix))
  • 204.106.17.0/24 (256 addresses (/24 prefix))

IPv6 Prefixes (4 total)

  • 2607:f790::/32
  • 2620:84:c000::/48
  • 2620:11f:7008::/48