Korea Telecom IP Ranges
Korea Telecom is a consumer and business internet provider. Its network is registered under AS4766 with APNIC, and it announces 2147 IPv4 prefixes to the global routing table.
- Provider
- Korea Telecom
- Primary ASN
- AS4766
- Category
- ISP
- Headquarters
- Seongnam, South Korea
- Announced IPv4 prefixes
- 2147
- Registry
- APNIC
Known IP ranges
These prefixes are currently announced to the global routing table by AS4766 (KIXS-AS-KR-KR - Korea Telecom). Prefix sets change over time - use WHOIS Lookup for the authoritative record on any specific address.
59.0.0.0/11
121.128.0.0/11
125.128.0.0/11
121.160.0.0/11
121.176.0.0/12
183.112.0.0/12
125.128.0.0/12
125.144.0.0/12
121.160.0.0/12
118.48.0.0/12
2400:130::/30
2400:144::/30
2400:140::/30 (IPv6)
What does a Korea Telecom IP mean in a privacy test?
Seeing a Korea Telecom IP address as your visible address means you are connecting directly through your Korea Telecom line with no VPN active. If you expected a VPN exit, this tells you the tunnel is not carrying your traffic.
Related tools
Frequently asked questions
What IP ranges does Korea Telecom use?
Korea Telecom announces 2147 IPv4 prefixes and 35 IPv6 prefixes under AS4766. Larger blocks include 59.0.0.0/11, 121.128.0.0/11, 125.128.0.0/11. The full current list is published by APNIC, and prefixes change as the network grows.
Why does a Korea Telecom IP appear in my privacy test?
Seeing a Korea Telecom IP address as your visible address means you are connecting directly through your Korea Telecom line with no VPN active. If you expected a VPN exit, this tells you the tunnel is not carrying your traffic.
How large is the Korea Telecom network?
By CAIDA's AS Rank, AS4766 reaches 979 networks through its customer cone, covering roughly 187.2 million IPv4 addresses. That places it at global rank 61 among all autonomous systems.
How do I look up a Korea Telecom IP address?
Enter the address in the MyIPScan IP Geolocation Lookup. Addresses in this network return AS4766 (KIXS-AS-KR-KR - Korea Telecom). WHOIS Lookup shows the registered CIDR block for any specific address.
What ASN does Korea Telecom use?
Korea Telecom operates AS4766, registered with APNIC and held by KIXS-AS-KR-KR - Korea Telecom. In a privacy test this ASN is what identifies traffic as belonging to their network.