$ query “AS5421” --type=asn → 1 result(s)
AS5421 · SU-NET-AS
Sofia University St. Kliment Ohridski
AS5421 is run by Sofia University St. Kliment Ohridski and is an educational/research stub network, established in Bulgaria in 2001. The system announces 8 192 IPv4 addresses, and supports IPv6. Most of its address space is geolocated to Bulgaria.
Basic Information
- Country
- 🇧🇬 Bulgaria
- Category
- Education/Research
- Network Role
- Stub Network
- Data Origin
- Authoritative — Metadata from authoritative RIR registry (ARIN, RIPE, APNIC, etc.)
- Registered
- October 25, 2001
- Last Changed
- March 04, 2026
- Last Seen
- April 30, 2026 (active)
Prefix Summary
- IPv4 Prefixes (raw / aggregated)
- 3 / 1
- IPv6 Prefixes (raw / aggregated)
- 3 / 1
- IPv4 Addresses
- 8 192
- Largest IPv4 Prefix
- /19 (8 192 addresses)
- Largest IPv6 Prefix
- /47
- Geolocated Countries
- 🇧🇬 Bulgaria (16 384 IPs)
- Prefix Changed
- March 04, 2026
Reputation
- Reputation
- Pristine — 0 flagged IPs
Connectivity Summary
- Upstream Providers
- 2 upstreams providing transit
- Degree
- 2 unique BGP neighbors
- Reach
- 0 networks in customer cone
Upstream Providers (2)
Prefix Lists
IPv4 Prefixes (3 total)
- 62.44.96.0/19 (8 192 addresses (/19 prefix))
IPv6 Prefixes (3 total)
- 2001:67c:20d0::/47