$ query “AS553” --type=asn → 1 result(s)

AS553 · BELWUE

Universitaet Stuttgart

AS553 is operated by Universitaet Stuttgart and serves as a mid-size transit provider, based in Germany since 2002. The system announces an impressive 2.1 million IPv4 addresses, including a /15, and supports IPv6. Its primary geographic footprint is in Germany.

  • Top 5% — Top 5% of all autonomous systems by reach and degree
  • #4 in Germany — Top 10 by reach within country

Basic Information

Country
🇩🇪 Germany
Category
Education/Research
Network Role
Mid-size Transit
Data Origin
Authoritative — Metadata from authoritative RIR registry (ARIN, RIPE, APNIC, etc.)
Registered
August 27, 2002
Last Changed
March 04, 2026
Last Seen
April 19, 2026 (active)

Prefix Summary

IPv4 Prefixes (raw / aggregated)
95 / 42
IPv6 Prefixes (raw / aggregated)
4 / 3
IPv4 Addresses
2 115 840
Largest IPv4 Prefix
/15 (131 072 addresses)
Largest IPv6 Prefix
/29
Geolocated Countries
🇩🇪 Germany (3 048 960 IPs)
Prefix Changed
April 09, 2026

Reputation

Reputation
Good — 1 flagged IPs out of 2 115 840 total (0.00%)

Connectivity Summary

Upstream Providers
4 upstreams providing transit
Peers
985 networks exchanging traffic without transit
Downstream Customers
15 downstreams buying transit
Unclassified
3 unclassified BGP neighbors
Degree
1 007 unique BGP neighbors
Reach
36 590 networks in customer cone

Upstream Providers (4)

  • AS174 — COGENT-174 (Tier-1 transit)
  • AS1299 — TWELVE99 (Tier-1 transit)
  • AS2914 — NTT-DATA-2914 (Tier-1 transit)
  • AS3320 — DTAG (Tier-1 transit)

Prefix Lists

IPv4 Prefixes (95 total)

  • 141.18.0.0/15 (131 072 addresses (/15 prefix))
  • 193.196.0.0/15 (131 072 addresses (/15 prefix))
  • 141.68.0.0/15 (131 072 addresses (/15 prefix))
  • 141.58.0.0/15 (131 072 addresses (/15 prefix))
  • 134.155.0.0/16 (65 536 addresses (/16 prefix))
  • 141.79.0.0/16 (65 536 addresses (/16 prefix))
  • 134.34.0.0/16 (65 536 addresses (/16 prefix))
  • 134.60.0.0/16 (65 536 addresses (/16 prefix))
  • 134.103.0.0/16 (65 536 addresses (/16 prefix))
  • 134.108.0.0/16 (65 536 addresses (/16 prefix))
  • 129.69.0.0/16 (65 536 addresses (/16 prefix))
  • 141.7.0.0/16 (65 536 addresses (/16 prefix))
  • 141.10.0.0/16 (65 536 addresses (/16 prefix))
  • 141.87.0.0/16 (65 536 addresses (/16 prefix))
  • 141.28.0.0/16 (65 536 addresses (/16 prefix))
  • 141.31.0.0/16 (65 536 addresses (/16 prefix))
  • 141.37.0.0/16 (65 536 addresses (/16 prefix))
  • 141.47.0.0/16 (65 536 addresses (/16 prefix))
  • 129.206.0.0/16 (65 536 addresses (/16 prefix))
  • 141.62.0.0/16 (65 536 addresses (/16 prefix))
  • 129.143.0.0/16 (65 536 addresses (/16 prefix))
  • 141.70.0.0/16 (65 536 addresses (/16 prefix))
  • 134.2.0.0/16 (65 536 addresses (/16 prefix))
  • 141.72.0.0/16 (65 536 addresses (/16 prefix))
  • 132.230.0.0/16 (65 536 addresses (/16 prefix))
  • 144.41.0.0/16 (65 536 addresses (/16 prefix))
  • 147.142.0.0/16 (65 536 addresses (/16 prefix))
  • 161.42.0.0/16 (65 536 addresses (/16 prefix))
  • 192.52.0.0/19 (8 192 addresses (/19 prefix))
  • 192.52.32.0/20 (4 096 addresses (/20 prefix))
  • 45.90.132.0/22 (1 024 addresses (/22 prefix))
  • 185.134.84.0/22 (1 024 addresses (/22 prefix))
  • 192.108.40.0/22 (1 024 addresses (/22 prefix))
  • 192.108.36.0/22 (1 024 addresses (/22 prefix))
  • 192.52.48.0/23 (512 addresses (/23 prefix))
  • 192.42.143.0/24 (256 addresses (/24 prefix))
  • 192.67.208.0/24 (256 addresses (/24 prefix))
  • 192.108.35.0/24 (256 addresses (/24 prefix))
  • 153.96.83.0/24 (256 addresses (/24 prefix))
  • 192.52.50.0/24 (256 addresses (/24 prefix))
  • 192.108.44.0/24 (256 addresses (/24 prefix))
  • 178.251.231.0/24 (256 addresses (/24 prefix))

IPv6 Prefixes (4 total)

  • 2001:7c0::/29
  • 2a06:ec00::/29
  • 2a0e:3c0::/29