$ query “AS210203” --type=asn → 1 result(s)
AS210203 — RETN-IT-AS
RETN Limited
AS210203 is a residential access provider run by RETN Limited, registered in the United Kingdom since 2018. The network announces 512 IPv4 addresses. No IPv6 support — it's 2026, just saying.
Basic Information
- Country
- 🇬🇧 United Kingdom
- Category
- Internet Service Provider
- Network Role
- Access Provider
- Data Origin
- Authoritative — Metadata from authoritative RIR registry (ARIN, RIPE, APNIC, etc.)
- Registered
- September 19, 2018
- Last Changed
- March 04, 2026
- Last Seen
- March 05, 2026
Prefix Summary
- IPv4 Prefixes (raw / aggregated)
- 1 / 1
- IPv6 Prefixes (raw / aggregated)
- 0 / 0
- IPv4 Addresses
- 512
- Largest IPv4 Prefix
- /23 (512 addresses)
- Geolocated Countries
- 🇦🇺 AU (1 IPs)
- Prefix Changed
- March 04, 2026
Reputation
- Reputation
- Pristine — 0 flagged IPs out of 512 total (0.00%)
Connectivity Summary
- Upstream Providers
- 3 upstream autonomous systems providing transit
- Peers
- 0 autonomous systems exchanging traffic without transit fees
- Downstream Customers
- 1 downstream autonomous systems buying transit
- Degree
- 4 unique BGP neighbors (providers + customers + peers)
- Reach
- 17 — customer cone size measuring network influence
- Degree Rank
- #20 008
- Reach Rank
- #2 489
Upstream Providers (3)
Prefix Lists
IPv4 Prefixes (1 total)
- 139.45.198.0/23 (512 addresses)