$ query “AS4766” --type=asn → 1 result(s)

AS4766 · KIXS-AS

Korea Telecom

AS4766 is owned by Korea Telecom and is a major transit provider, based in South Korea since 2017. The system announces a whopping 47.2 million IPv4 addresses (1.27% of routable IPv4 space), including a /10, and supports IPv6. The bulk of its IP address space is in South Korea, with additional presence in the United States and Germany, and smaller footprints in 9 additional countries. This AS's prefix announcements have been recently modified.

  • Top 5% — Top 5% of all autonomous systems by reach and degree
  • Space Overlord — Over 10 million IPv4 addresses
  • #67 by Reach — Top 100 by customer cone size
  • #1 in South Korea — Top 10 by reach within country

Basic Information

Country
🇰🇷 South Korea
Category
Internet Service Provider
Network Role
Major Transit
Data Origin
Authoritative — Metadata from authoritative RIR registry (ARIN, RIPE, APNIC, etc.)
Registered
December 01, 2017
Last Changed
October 01, 2026
Last Seen
October 21, 2026 (active)

Prefix Summary

IPv4 Prefixes (raw / aggregated)
2 162 / 687
IPv6 Prefixes (raw / aggregated)
64 / 1
IPv4 Addresses
47 221 248
Largest IPv4 Prefix
/10 (4 194 304 addresses)
Largest IPv6 Prefix
/20
Geolocated Countries
🇰🇷 South Korea (47 169 280 IPs), 🇺🇸 United States (32 000 IPs), 🇩🇪 Germany (5 376 IPs) and 9 more
Prefix Changed
October 17, 2026

Reputation

Reputation
Fair — 1 578 flagged IPs out of 47 221 248 total (0.00%)
Open Proxies
15 known open proxies in this network

Connectivity Summary

Upstream Providers
7 upstreams providing transit
Peers
87 networks exchanging traffic without transit
Downstream Customers
567 downstreams buying transit
Unclassified
8 unclassified BGP neighbors
Degree
669 unique BGP neighbors
Reach
1 002 networks in customer cone

Upstream Providers (7)

  • AS6939 — HURRICANE
  • AS3356 — LEVEL3 (Tier-1 transit)
  • AS174 — COGENT-174 (Tier-1 transit)
  • AS1299 — TWELVE99 (Tier-1 transit)
  • AS23764 — CTGNET
  • AS701 — UUNET (Tier-1 transit)
  • AS1239 — COGENT-1239

Prefix Lists

IPv4 Prefixes (2 162 total)

  • 121.128.0.0/10 (4 194 304 addresses (/10 prefix))
  • 175.192.0.0/10 (4 194 304 addresses (/10 prefix))
  • 14.32.0.0/11 (2 097 152 addresses (/11 prefix))
  • 14.64.0.0/11 (2 097 152 addresses (/11 prefix))
  • 59.0.0.0/11 (2 097 152 addresses (/11 prefix))
  • 112.160.0.0/11 (2 097 152 addresses (/11 prefix))
  • 118.32.0.0/11 (2 097 152 addresses (/11 prefix))
  • 119.192.0.0/11 (2 097 152 addresses (/11 prefix))
  • 125.128.0.0/11 (2 097 152 addresses (/11 prefix))
  • 183.96.0.0/11 (2 097 152 addresses (/11 prefix))
  • 1.96.0.0/12 (1 048 576 addresses (/12 prefix))
  • 39.16.0.0/12 (1 048 576 addresses (/12 prefix))
  • 49.16.0.0/12 (1 048 576 addresses (/12 prefix))
  • 115.0.0.0/12 (1 048 576 addresses (/12 prefix))
  • 169.208.0.0/12 (1 048 576 addresses (/12 prefix))
  • 218.144.0.0/12 (1 048 576 addresses (/12 prefix))
  • 220.80.0.0/12 (1 048 576 addresses (/12 prefix))
  • 221.144.0.0/12 (1 048 576 addresses (/12 prefix))
  • 222.96.0.0/12 (1 048 576 addresses (/12 prefix))
  • 27.232.0.0/13 (524 288 addresses (/13 prefix))
  • 49.56.0.0/13 (524 288 addresses (/13 prefix))
  • 61.72.0.0/13 (524 288 addresses (/13 prefix))
  • 115.16.0.0/13 (524 288 addresses (/13 prefix))
  • 211.192.0.0/13 (524 288 addresses (/13 prefix))
  • 211.216.0.0/13 (524 288 addresses (/13 prefix))
  • 211.224.0.0/13 (524 288 addresses (/13 prefix))
  • 220.72.0.0/13 (524 288 addresses (/13 prefix))
  • 220.120.0.0/13 (524 288 addresses (/13 prefix))
  • 221.160.0.0/13 (524 288 addresses (/13 prefix))
  • 222.112.0.0/13 (524 288 addresses (/13 prefix))
  • 39.4.0.0/14 (262 144 addresses (/14 prefix))
  • 61.80.0.0/14 (262 144 addresses (/14 prefix))
  • 110.68.0.0/14 (262 144 addresses (/14 prefix))
  • 211.104.0.0/14 (262 144 addresses (/14 prefix))
  • 220.116.0.0/14 (262 144 addresses (/14 prefix))
  • 61.84.0.0/15 (131 072 addresses (/15 prefix))
  • 116.200.0.0/15 (131 072 addresses (/15 prefix))
  • 118.234.0.0/15 (131 072 addresses (/15 prefix))
  • 210.90.0.0/15 (131 072 addresses (/15 prefix))
  • 210.104.0.0/15 (131 072 addresses (/15 prefix))
  • 210.178.0.0/15 (131 072 addresses (/15 prefix))
  • 210.222.0.0/15 (131 072 addresses (/15 prefix))
  • 211.54.0.0/15 (131 072 addresses (/15 prefix))
  • 211.184.0.0/15 (131 072 addresses (/15 prefix))
  • 211.250.0.0/15 (131 072 addresses (/15 prefix))
  • 211.252.0.0/15 (131 072 addresses (/15 prefix))
  • 220.70.0.0/15 (131 072 addresses (/15 prefix))
  • 222.120.0.0/15 (131 072 addresses (/15 prefix))
  • 49.254.0.0/16 (65 536 addresses (/16 prefix))
  • 121.126.0.0/16 (65 536 addresses (/16 prefix))

IPv6 Prefixes (64 total)

  • 2400::/20