$ query “AS20900” --type=asn → 1 result(s)

AS20900 · AS-IMSNETORKS

IMS Networks SAS

AS20900 belongs to IMS Networks SAS and is a residential access provider, registered in France. The system announces a respectable 78 848 IPv4 addresses, including a /16, and supports IPv6. The bulk of its IP address space is in France.

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

Basic Information

Country
🇫🇷 France
Category
Internet Service Provider
Network Role
Access Provider
Data Origin
Authoritative — Metadata from authoritative RIR registry (ARIN, RIPE, APNIC, etc.)
Last Changed
March 04, 2026
Last Seen
September 21, 2026 (active)

Prefix Summary

IPv4 Prefixes (raw / aggregated)
25 / 10
IPv6 Prefixes (raw / aggregated)
1 / 1
IPv4 Addresses
78 848
Largest IPv4 Prefix
/16 (65 536 addresses)
Largest IPv6 Prefix
/32
Geolocated Countries
🇫🇷 France (156 160 IPs)
Prefix Changed
March 27, 2026

Reputation

Reputation
Pristine — 0 flagged IPs

Connectivity Summary

Upstream Providers
3 upstreams providing transit
Peers
50 networks exchanging traffic without transit
Downstream Customers
7 downstreams buying transit
Degree
60 unique BGP neighbors
Reach
7 networks in customer cone

Upstream Providers (3)

  • AS3356 — LEVEL3 (Tier-1 transit)
  • AS174 — COGENT (Tier-1 transit)
  • AS6762 — SEABONE-NET (Tier-1 transit)

Prefix Lists

IPv4 Prefixes (25 total)

  • 137.129.0.0/16 (65 536 addresses (/16 prefix))
  • 213.190.64.0/19 (8 192 addresses (/19 prefix))
  • 31.217.232.0/21 (2 048 addresses (/21 prefix))
  • 185.182.252.0/22 (1 024 addresses (/22 prefix))
  • 91.214.114.0/23 (512 addresses (/23 prefix))
  • 194.4.12.0/23 (512 addresses (/23 prefix))
  • 91.231.175.0/24 (256 addresses (/24 prefix))
  • 176.111.246.0/24 (256 addresses (/24 prefix))
  • 194.4.7.0/24 (256 addresses (/24 prefix))
  • 194.4.10.0/24 (256 addresses (/24 prefix))

IPv6 Prefixes (1 total)

  • 2001:1b08::/32