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Data as of Nov 10, 2026

221.144.0.0/13

24 anonymizer addresses · <0.01% · VPN

Korea Telecom

Announcement
this exact prefix
No RPKI
Announced by
AS4766
Type
Residential
>99% of it

Residential-proxy exits

Proxy exits
2,972
0.57% of its addresses · listed by providers
Always-on exits
130
4.4% of its exits
Spread
1,212 of 2,048
/24s with at least one exit
Providers
122
selling exits here

/24s with the most always-on exits

/24Always-on exitsProxy exits
221.150.205.0/2425
221.146.125.0/2425
221.148.42.0/2424
221.145.88.0/2424
221.150.166.0/2423
221.147.56.0/2423
221.148.163.0/2422
221.149.80.0/2422
221.149.11.0/2418
221.149.42.0/2418
221.149.84.0/2417
221.151.117.0/2417
221.145.195.0/2417
221.147.214.0/2417
221.148.178.0/2417
221.146.248.0/2417
221.149.225.0/2415
221.144.43.0/2415
221.144.71.0/2415
221.151.22.0/2415
221.149.8.0/2415
221.147.192.0/2415
221.145.234.0/2415
221.150.109.0/2415

Proxy providers listing exits

  • 2Captcha
  • 711Proxy
  • 9Proxy
  • ASHBURNPROXIES
  • Ake.net
  • AnyIP
  • B2Proxy
  • BartProxies
  • BirdProxies
  • BlurPath
  • BottingTools
  • Bright Data
  • BuyingProxy
  • ByteProxies
  • Byteful
  • CatProxies
  • CliProxy
  • CoreProxy
  • DataImpulse
  • Datarama
  • Decodo
  • EVOPROXY
  • EZProxies
  • EnigmaProxy
  • Evomi
  • FLEETPROXY
  • FastProxy
  • FlashProxy
  • FlexyProxies
  • FloppyData
  • GSocks
  • GeekProxy
  • Geonix
  • Geonode
  • GhostConnect
  • GloryCloud
  • GoProxies
  • GonzoProxy
  • HPROXY
  • HideProxy
  • HydraProxy
  • IPCola
  • IPFly
  • IPMUSK
  • IPOasis
  • IPPeak
  • IPRoyal
  • Infatica
  • InfiniteProxies
  • KindProxy
  • KocerRoxy
  • LemonBright
  • LemonLabs
  • LemonPrime
  • LightningProxies
  • LudaxProxy
  • MagneticProxy
  • MangoProxy
  • MarsProxies
  • Maskify
  • MoMoProxy
  • NSocks
  • NextProxy
  • NodeMaven
  • NodeProxy
  • NovProxy
  • NovaProxy
  • Novada
  • Oxylabs
  • PROXYON
  • PROXYSCRAPE
  • PROXYWING_BASIC
  • PSBProxy
  • PacketStream
  • PrivateByte
  • Proxies.fo
  • ProxiesVision
  • Proxio
  • Proxiware
  • Proxmint
  • Proxy-Cheap
  • Proxy-Seller
  • Proxy302
  • Proxy4U
  • ProxyEmpire
  • ProxyGeo
  • ProxyHat
  • ProxyRack
  • ProxyStyler
  • ProxyWing
  • Proxying
  • Proxyma
  • PuraRoute
  • Q2IP
  • QUANTICDATA
  • RH7Proxy
  • RainProxy
  • RapidProxy
  • RealProxy
  • ResiProxies
  • RoamProxy
  • RolaProxy
  • SPYDERPROXY_BASIC
  • SPYDERPROXY_PREMIUM
  • Shifter
  • Smartproxy
  • SpyderProxy
  • StrikeProxy
  • SwiftProxy
  • TalorData
  • Thordata
  • ThunderProxy
  • TrueProxies
  • TrustProxy
  • VantageProxies
  • VibeProxies
  • VitalData
  • VitalExclusive
  • VitalProxy
  • YumiProxy
  • ZENPROXY_LITE
  • ZENPROXY_PREMIUM
IPv4 market

Path

1 · Holder
Korea Telecom
2 · Leased from
not leased
3 · Announced by
AS4766 Korea Telecom
since Dec 2009 · 16.9 yr ago
4 · Use
VPN servicesnamed VPN Gate
Residential

Operators, sellers and brokers

VPN services

NameParentIn 221.144.0.0/13/24s
VPN GateUniversity of Tsukuba
24<0.01%
23

Lineage

How this block came to its use, oldest first. The whole IPv4 market →

221.144.0.0/13

From the registry to its use

  1. Jan 10, 2005
    Route object
    AS9318 SK Broadband Co Ltd
    NTTCOM route object for AS9318 SK Broadband Co Ltd, maintainer MAINT-AS9304
    221.149.161.0/24
  2. Mar 9, 2005
    Route object
    AS3549 Level 3 Parent, LLC
    REACH route object for AS3549 Level 3 Parent, LLC, maintainer MAINT-REACH-NOC
    221.149.161.0/24
  3. Mar 25, 2005
    Route object
    AS17860 Webzen Inc.
    NTTCOM route object for AS17860 Webzen Inc., maintainer MAINT-SKNETWORKS
    221.148.38.0/23
  4. May 9, 2005– Nov 9, 2026
    Announced
    AS4766 Korea Telecom
    as part of 221.144.0.0/12
    221.144.0.0/12
  5. Jan 9, 2006
    Route object
    AS9568 Korea Institute of Machinery Materials (Kimm)
    RADB route object for AS9568 Korea Institute of Machinery Materials (Kimm), maintainer MAINT-AS3786
    221.149.80.0/23
  6. Jan 9, 2006
    Route object
    AS9322 Institute of Information and Computing, EWHA WOMANS UNIV.
    RADB route object for AS9322 Institute of Information and Computing, EWHA WOMANS UNIV., maintainer MAINT-AS3786
    221.149.88.0/22
  7. Apr 28, 2006
    Route object
    AS9318 SK Broadband Co Ltd
    REACH route object for AS9318 SK Broadband Co Ltd, maintainer MAINT-REACH-NOC
    221.148.38.0/23
  8. Apr 28, 2006
    Route object
    AS9318 SK Broadband Co Ltd
    REACH route object for AS9318 SK Broadband Co Ltd, maintainer MAINT-REACH-NOC
    221.149.161.0/24
  9. May 4, 2008
    Route object
    AS9640 Korea Internet Security Agency
    NTTCOM route object for AS9640 Korea Internet Security Agency, maintainer MAINT-HANARO
    221.149.161.0/24
  10. Mar 19, 2009
    Route object
    AS9628 Tongyang Life Insurance Co., Ltd.
    RADB route object for AS9628 Tongyang Life Insurance Co., Ltd., maintainer MAINT-AS3786
    221.145.236.0/23
  11. Dec 8, 2009– Nov 9, 2026
    Announced
    AS4766 Korea Telecom
    Internet provider
  12. Feb 1, 2010
    Route object
    AS17860 Webzen Inc.
    RADB route object for AS17860 Webzen Inc., maintainer MAINT-AS4637
    221.148.38.0/23
  13. Mar 29, 2011
    Route object
    AS9318 SK Broadband Co Ltd
    RADB route object for AS9318 SK Broadband Co Ltd, maintainer MAINT-AS9318
    221.149.161.0/24
  14. Feb 15, 2012
    Route object
    AS55631
    RADB route object for AS55631, maintainer MAINT-AS4766
    221.149.236.0/24
  15. Dec 19, 2017
    Route object
    AS9640 Korea Internet Security Agency
    RADB route object for AS9640 Korea Internet Security Agency, maintainer MAINT-AS9318
    221.149.161.0/24
  16. Dec 25, 2017
    Route object
    AS45363 SunMoon University
    RADB route object for AS45363 SunMoon University, maintainer MAINT-AS9318
    221.145.236.0/24
  17. Dec 25, 2017
    Route object
    AS45363 SunMoon University
    RADB route object for AS45363 SunMoon University, maintainer MAINT-AS9318
    221.145.237.0/24
  18. Jan 3, 2019
    Route object
    AS17851 KPETRO
    RADB route object for AS17851 KPETRO, maintainer MAINT-AS9318
    221.150.131.0/24
  19. Jan 4, 2021
    Route object
    AS46012 Induk University
    RADB route object for AS46012 Induk University, maintainer MAINT-AS9318
    221.145.87.0/24
  20. today
    Registry record
    Korea Telecom
    ALLOCATED PORTABLE
    221.144.0.0/12
  21. today
    Used
    VPN Gate
    VPN

Announcements

Less specific

Covering announcements

PrefixOriginTypeProxy exitsHolderRPKI
221.144.0.0/12
since May 2005
AS4766Residential6,557
285 always on
Korea Telecom
Nesting

More-specifics by size

Sized by addresses, colored by each announcement's type. Click a tile with children to zoom in, a leaf to open it.
More specific

Announcements inside

Arrived
PrefixOriginTypeProxy exitsHolderRPKI
221.144.37.0/24
since Jan 2009
AS4766Residential1Korea Telecom
221.144.152.0/24
since Jan 2012
AS55622BusinessKorea Telecom
221.144.191.0/24
since Feb 2024
AS152198BusinessKorea Telecom
221.145.178.0/24
since Feb 2013
AS45400ResidentialKorea Telecom
221.145.224.0/24
since Sep 2012
AS4766ResidentialKorea Telecom
221.146.17.0/24
since Aug 2012
AS4766ResidentialKorea Telecom
221.146.193.0/24
since Jan 2007
AS9856BusinessKorea Telecom
221.146.229.0/24
since Oct 2014
AS9972HostingKorea Telecom
221.147.50.0/24
since Aug 2025
AS152214BusinessKorea Telecom
221.147.51.0/24
since Nov 2008
AS4766ResidentialKorea Telecom
221.147.52.0/24
since Nov 2008
AS4766ResidentialKorea Telecom
221.147.53.0/24
since Nov 2008
AS4766ResidentialKorea Telecom
221.147.54.0/24
since Nov 2008
AS4766ResidentialKorea Telecom
221.147.55.0/24
since Nov 2008
AS4766ResidentialKorea Telecom
221.147.83.0/24
since May 2005
AS9526BusinessKorea Telecom
221.147.101.0/24
since Feb 2022
AS9850BusinessKorea Telecom
221.149.141.0/24
since Jul 2010
AS10185BusinessKorea Telecom
221.149.230.0/24
since Sep 2008
AS45360BusinessKorea Telecom
221.149.240.0/22
since Jan 2026
AS131842BusinessKorea Telecom
221.150.21.0/24
since May 2005
AS10184BusinessKorea Telecom
221.150.114.0/24
since Oct 2019
AS55592HostingKorea Telecom
221.150.156.0/23
since Nov 2008
AS4766ResidentialKorea Telecom
221.150.175.0/25AS4766ResidentialKorea Telecom
221.150.196.0/24
since Nov 2020
AS38697BusinessKorea Telecom
221.151.165.0/24
since Oct 2016
AS38405Business7Korea Telecom
221.151.172.0/24
since Dec 2025
AS38112BusinessKorea Telecom
221.151.180.0/24
since Jan 2023
AS9526BusinessKorea Telecom

Composition

The types across the prefix's announced space, by addresses.

Announced space

Address share

Announced space

Types across the prefix

524,288 addresses
TypeAddressesShareRanges
Residential519,400>99%58
Business3,8400.73%12
Hosting1,0240.20%4
VPNanonymizer24<0.01%24

Network & registry

AnnouncementRouting historyRPKI & IRRWhois & abuse
Origin network

AS4766

KR
Name
Korea Telecom
Type
Internet provider
Registered
Apr 22, 1996
Domain
kt.com
Website
www.kt.com/eng/main.jsp
Industry
Internet Service Provider (ISP)
Spamhaus ASN-DROP
not listed
VPN servers
1