HomeASN LookupAS4766

AS4766 KIXS-AS-KR-KR - Korea Telecom

🇰🇷

Org handle: A9149F3E

Korea Telecom

APNICallocated
Announced Prefixes (BGP)
2,298total
2,233 IPv465 IPv6
IPv4 Addresses
Allocated (RIR)25.8M
Announced (BGP)70.0M
IPv6 Addresses
Allocated (RIR)3.2×10³²
Announced (BGP)3.5×10³²
Prefix Limit (IPv4)
50,000
Prefix Limit (IPv6)
200
Country
🇰🇷 KR
RIR
APNIC
Status
allocated
Allocated
1996-04-22

Routing hygiene

Score 55/100 · High risk
RPKI ROA coverage
6.2%
47 prefixes RPKI invalid
IRR route objects
70.5%
610 prefixes registered for another origin
Hijack signals
36
29 announced against others' ROAs, 7 own announced by others
Upstreams
19
diversity 75/100
  • 94% of announced prefixes (2156 of 2298) have no valid ROA, 47 of them RPKI invalid
  • 227 prefixes registered in IRR route objects for another active network and not authorized by a ROA
  • Announces 29 prefixes that RPKI assigns to another network (possible hijack or misconfiguration)
  • 30% of announced prefixes (679 of 2298) have no IRR route object for this ASN

Based on 2,298 announced prefixes, updated daily (2026-10-25). How the score works · RPKI explained

Listed on the threat map (2026-10-25)

Large hosting providers appear because attackers rent their servers, not necessarily because of the operator.

Announced Prefixes

(BGP)1,000 of 2,298
|
Prefix
RPKI
IRR
Last Seen
1.96.0.0/14
No ROA
Other IRR
2026-10-27
1.100.0.0/14
No ROA
Other IRR
2026-10-27
1.104.0.0/14
No ROA
Other IRR
2026-10-27
1.108.0.0/14
No ROA
Other IRR
2026-10-27
1.231.13.0/24
No ROA-2026-10-27
1.231.122.0/24
No ROA-2026-10-27
1.231.136.0/24
No ROA-2026-10-27
1.231.182.0/24
No ROA-2026-10-27
1.231.183.0/24
No ROA-2026-10-27
1.231.184.0/24
No ROA-2026-10-27
1-10 of 1,000
1 / 100

Allocated Prefixes

(RIR)272
Prefix
Country
RIR
Status
2.27.212.0/23🇪🇺 EURIPEassigned
9.233.32.0/20🇰🇷 KRRIPEassigned
23.133.148.0/24🇺🇸 USARINallocated
23.133.244.0/24🇺🇸 USARINallocated
23.134.4.0/24🇺🇸 USARINallocated
23.134.220.0/24🇺🇸 USARINallocated
27.96.136.0/21🇰🇷 KRAPNICallocated
31.56.172.0/24🇹🇼 TWRIPEassigned
31.56.173.0/24🇹🇼 TWRIPEassigned
31.56.242.0/24🇹🇼 TWRIPEassigned
1-10 of 272
1 / 28

All 2,298 announced prefixes of AS4766 →

BGP Neighbours

(seen in AS paths)

Upstreams (17)

Networks AS4766 hands its own prefixes to: transit providers, or peers at an exchange.

  • AS6939Hurricane Electric1,072
  • AS9318SK Broadband876
  • AS9002RETN Limited387
  • AS17676SoftBank185
  • AS701Verizon Business92
  • AS1299TWELVE99 Arelion Sweden AB87
  • AS6762SEABONE NET TELECOM ITALIA SPARKLE S.P.A38
  • AS174Cogent Communications37
  • AS2497Internet Initiative Japan27
  • AS3356Level 3 Parent26
  • AS2914NTT America15
  • AS9286KINX12
  • AS9583Sify Limited12
  • AS3491PCCW Global (HK)11
  • AS23764CTGNet3
  • AS2516KDDI CORPORATION2
  • AS60068CDN77 Datacamp Limited1

Downstreams (100 of 543)

Networks whose own prefixes AS4766 passes on: usually its customers.

  • AS17853LGTELECOM870
  • AS17841NATIONAL INFORMATION RESOURCES SERVICE651
  • AS1237KISTI200
  • AS38681Jeollanamdo Educational Research Information Institute129
  • AS55592Korea Data Telecommunication122
  • AS7562HCN Dongjak117
  • AS55615DOUZONEBIZON99
  • AS10088KWANGWOON UNIVERSITY85
  • AS9524Hyundai Autoever83
  • AS17881Inet Hosting83
  • AS55618UNIVERSITY OF ULSAN75
  • AS38105SOON CHUN HYANG UNIVERSITY72
  • AS38398Gyeonggi Uijeongbu Office Of Education72
  • AS4775Globe Telecoms71
  • AS9578Cheiljedang68
  • AS38688GSNeotek66
  • AS9530SHINSEGAE I C62
  • AS9870DONG EUI UNIVERSITY59
  • AS23570UNIVERSITY OF INCHEON59
  • AS9647Seoul Metropolitan Government58
  • AS38676Flexnetworks58
  • AS45382Hostcenter58
  • AS18305POSCO DX57
  • AS131822Korea National University Of Transportation54
  • AS46010SAMJUNG DATA SERVICE53
  • AS23591LS ITC52
  • AS38705KOREA DATA52
  • AS55593Netmarble52
  • AS17584Inchon Metropolitan Office Of Education51
  • AS9694Seokyung Cable Television47
  • AS9526KOSCOM46
  • AS38701Piranha Systems46
  • AS38401Gyeonggi Provincial Anseong Office Of Education42
  • AS9955Baekseok University40
  • AS9631Youngsan University37
  • AS9696Oscar Enterprise36
  • AS38417Gyeonggi Province Gapyeong Office Of Education36
  • AS10176Daejon Metropolitan Office Of Education34
  • AS46009YABESK34
  • AS64050BGP Network Limited34
  • AS20940AKAMAI ASN1 Akamai International B.V33
  • AS9568KOREA INSTITUTE OF MACHINERY MATERIALS (KIMM)32
  • AS55628Incheon Free Economic Zone32
  • AS9323DONGGUK University31
  • AS9842LOTTE INNOVATE31
  • AS26464Joyent31
  • AS45403INCHEON TECHNOPARK31
  • AS10159Korea Aerospace University30
  • AS23579Seoul Metropolitan Office Of Education30
  • AS6619SamsungSDS29
  • AS9708Pukyong National University29
  • AS9859ChungCheong University27
  • AS38391Gyeonggi Provincial Gimpo Office Of Education27
  • AS7679QTnet26
  • AS9638National Agricultural Cooperative Federation26
  • AS18023Korea Maritime And Ocean University26
  • AS18403FPT Telecom Company26
  • AS38390Goyang Office Of Education26
  • AS38395GwangJuHaNam Office Of Education26
  • AS38400Gyeonggi Do Pyongtaek Office Education26
  • AS9455KERIS25
  • AS38408GYEONGGI PROVINCIAL ANYANG OFFICE OF EDUCATION25
  • AS4793Hyundai Heavy Industries24
  • AS10167HANVIT BANK24
  • AS17616Barofn24
  • AS38422Seowon University24
  • AS54994Meteverse Limited24
  • AS10185Hana Bank23
  • AS38392KYONGGI YANGPYEONG OFFICE OF EDUCATION23
  • AS38410Pocheon Office Of Education23
  • AS38414Gyeonggi Siheung Office Of Education23
  • AS38690HyosungITX23
  • AS10171SKTelink22
  • AS18027Namseoul University22
  • AS38396Paju Office Of Education Gyeonggi Province22
  • AS38399Gyeonggi Do Yeoju Office Of Education22
  • AS38405Gwang Myeong Office Of Education22
  • AS38409Dongducheonyangju Office Of Education22
  • AS38412Gyeonggi Do Icheon Office Of Education22
  • AS38415Guri Namyangju Office Of Education22
  • AS38416Gyeonggi Yeoncheon Office Of Education22
  • AS38695Bucheon University22
  • AS4668LG CNS21
  • AS9270National Infomation Society Agency21
  • AS9491NICE21
  • AS9867VISION College Of Jeonju21
  • AS38407Gyeonggi Do Ansan Office Of Education21
  • AS4790Chosun Ilbo20
  • AS9957KINX20
  • AS23552Korea Nazarene University20
  • AS9962Sunchon National University19
  • AS10060YONSEI UNIVERSITY HEALTH SYSTEM19
  • AS18031Sangmyung University19
  • AS18337KyungSan University19
  • AS9322Institute Of Information And Computing, EWHA WOMANS UNIV18
  • AS9684HANWHA . Information Service Div18
  • AS23714Keimyung University18
  • AS45361Ulsan Jung Ang Broadcasting Network18
  • AS45399Hanjin Information Systems Telecommunication18
  • AS136209CyberForest18

Other adjacent networks (13)

Adjacent to AS4766 in the transit part of AS paths: peers, providers or customers.

  • AS132337Axclusive65
  • AS4040Korea Telecom50
  • AS963N963 PTE23
  • AS7473Singapore Telecommunications23
  • AS2044Digital Fortress2
  • AS58453China Mobile International Limited2
  • AS4637Telstra Global1
  • AS4648Global Gateway Internet1
  • AS5713Telkom . Telkom1
  • AS12389ROSTELECOM PJSC Rostelecom1
  • AS37271Workonline Communications(Pty) Workonline Communications(Pty)1
  • AS56665TANGO PROXIMUS NXT Proximus Luxembourg S.A1
  • AS139057Edgenext Legend Dynasty Pte1
ASPA
No ASPA
External Links
APNIC WhoisRIPEstat

Learn more

API
Open
GEThttps://api.ipctl.io/v1/asn/4766

Returns ASN details, announced prefixes, and BGP routing data.

curl -s "https://api.ipctl.io/v1/asn/4766" | jq