$ query “AS553” --type=asn → 1 result(s)
AS553 — BELWUE
Universitaet Stuttgart
AS553 is a mid-size transit provider run by Universitaet Stuttgart, based in Germany since 2002. The network announces an impressive 2.1 million IPv4 addresses, including a /15. Supports IPv6.
- 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
- March 04, 2026
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
- 🇩🇪 DE (63 IPs)
- Prefix Changed
- March 04, 2026
Reputation
- Reputation
- Pristine — 0 flagged IPs out of 2 115 840 total (0.00%)
Connectivity Summary
- Upstream Providers
- 4 upstream autonomous systems providing transit
- Peers
- 982 autonomous systems exchanging traffic without transit fees
- Downstream Customers
- 15 downstream autonomous systems buying transit
- Degree
- 1 004 unique BGP neighbors (providers + customers + peers)
- Reach
- 34 941 — customer cone size measuring network influence
- Degree Rank
- #146
- Reach Rank
- #276
- Country Rank
- #4
Upstream Providers (4)
Prefix Lists
IPv4 Prefixes (95 total)
- 141.18.0.0/15 (131 072 addresses)
- 141.58.0.0/15 (131 072 addresses)
- 141.68.0.0/15 (131 072 addresses)
- 193.196.0.0/15 (131 072 addresses)
- 129.69.0.0/16 (65 536 addresses)
- 129.143.0.0/16 (65 536 addresses)
- 129.206.0.0/16 (65 536 addresses)
- 132.230.0.0/16 (65 536 addresses)
- 134.2.0.0/16 (65 536 addresses)
- 134.34.0.0/16 (65 536 addresses)
- 134.60.0.0/16 (65 536 addresses)
- 134.103.0.0/16 (65 536 addresses)
- 134.108.0.0/16 (65 536 addresses)
- 134.155.0.0/16 (65 536 addresses)
- 141.7.0.0/16 (65 536 addresses)
- 141.10.0.0/16 (65 536 addresses)
- 141.28.0.0/16 (65 536 addresses)
- 141.31.0.0/16 (65 536 addresses)
- 141.37.0.0/16 (65 536 addresses)
- 141.47.0.0/16 (65 536 addresses)
- 141.62.0.0/16 (65 536 addresses)
- 141.70.0.0/16 (65 536 addresses)
- 141.72.0.0/16 (65 536 addresses)
- 141.79.0.0/16 (65 536 addresses)
- 141.87.0.0/16 (65 536 addresses)
- 144.41.0.0/16 (65 536 addresses)
- 147.142.0.0/16 (65 536 addresses)
- 161.42.0.0/16 (65 536 addresses)
- 192.52.0.0/19 (8 192 addresses)
- 192.52.32.0/20 (4 096 addresses)
- 45.90.132.0/22 (1 024 addresses)
- 185.134.84.0/22 (1 024 addresses)
- 192.108.36.0/22 (1 024 addresses)
- 192.108.40.0/22 (1 024 addresses)
- 192.52.48.0/23 (512 addresses)
- 45.12.171.0/24 (256 addresses)
- 153.96.83.0/24 (256 addresses)
- 192.42.143.0/24 (256 addresses)
- 192.52.50.0/24 (256 addresses)
- 192.67.208.0/24 (256 addresses)
- 192.108.35.0/24 (256 addresses)
- 192.108.44.0/24 (256 addresses)
IPv6 Prefixes (4 total)
- 2001:7c0::/29
- 2a06:ec00::/29
- 2a0e:3c0::/29