$ query “AS51973” --type=asn → 1 result(s)
AS51973 · KOLT-AS
Koltushsky Internet Ltd
AS51973 belongs to Koltushsky Internet Ltd and is a residential access provider, registered in Russia since 2010. The system announces 8 192 IPv4 addresses. Most of its address space is geolocated to Russia. No IPv6 support — it's 2026, just saying.
Basic Information
- Country
- 🇷🇺 Russia
- Category
- Internet Service Provider
- Network Role
- Access Provider
- Data Origin
- Authoritative — Metadata from authoritative RIR registry (ARIN, RIPE, APNIC, etc.)
- Registered
- December 09, 2010
- Last Changed
- March 04, 2026
- Last Seen
- July 25, 2026 (active)
Prefix Summary
- IPv4 Prefixes (raw / aggregated)
- 2 / 2
- IPv6 Prefixes (raw / aggregated)
- 0 / 0
- IPv4 Addresses
- 8 192
- Largest IPv4 Prefix
- /20 (4 096 addresses)
- Geolocated Countries
- 🇷🇺 Russia (12 288 IPs)
- Prefix Changed
- March 04, 2026
Reputation
- Reputation
- Pristine — 0 flagged IPs
Connectivity Summary
- Upstream Providers
- 3 upstreams providing transit
- Peers
- 11 networks exchanging traffic without transit
- Downstream Customers
- 2 downstreams buying transit
- Unclassified
- 3 unclassified BGP neighbors
- Degree
- 19 unique BGP neighbors
- Reach
- 2 networks in customer cone
Upstream Providers (3)
Prefix Lists
IPv4 Prefixes (2 total)
- 46.149.32.0/20 (4 096 addresses (/20 prefix))
- 81.163.240.0/20 (4 096 addresses (/20 prefix))