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Data as of Nov 4, 2026

121.128.0.0/13

25 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
3,264
0.62% of its addresses · listed by providers
Always-on exits
159
4.9% of its exits
Spread
1,331 of 2,048
/24s with at least one exit
Providers
107
selling exits here

/24s with the most always-on exits

/24Always-on exitsProxy exits
121.129.205.0/2427
121.130.194.0/2425
121.135.151.0/2424
121.129.146.0/2423
121.133.199.0/24114
121.130.171.0/24110
121.132.114.0/2419
121.129.44.0/2419
121.135.1.0/2419
121.134.148.0/2419
121.133.89.0/2418
121.135.100.0/2417
121.128.238.0/2416
121.132.117.0/2416
121.135.97.0/2416
121.134.10.0/2415
121.130.35.0/2415
121.129.21.0/2415
121.132.52.0/2415
121.129.35.0/2415
121.135.8.0/2415
121.130.120.0/2415
121.132.48.0/2415
121.131.142.0/2415

Proxy providers listing exits

  • 2Captcha
  • 711Proxy
  • 9Proxy
  • Ake.net
  • AnyIP
  • B2Proxy
  • BartProxies
  • BestProxy
  • BirdProxies
  • BlurPath
  • BottingTools
  • Bright Data
  • BuyingProxy
  • ByteProxies
  • Byteful
  • CatProxies
  • CliProxy
  • ColaProxy
  • CoreProxy
  • DataImpulse
  • Datarama
  • Decodo
  • EZProxies
  • EnigmaProxy
  • Evomi
  • FastProxy
  • FlashProxy
  • FlexyProxies
  • FloppyData
  • GSocks
  • GeekProxy
  • Geonix
  • Geonode
  • GhostConnect
  • GloryCloud
  • GoProxies
  • GonzoProxy
  • HideProxy
  • HydraProxy
  • IPCola
  • IPFly
  • 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
  • PSBProxy
  • PacketStream
  • PrivateByte
  • ProxiesVision
  • Proxio
  • Proxiware
  • Proxmint
  • Proxy-Cheap
  • Proxy-Seller
  • Proxy4U
  • ProxyEmpire
  • ProxyGeo
  • ProxyHat
  • ProxyRack
  • ProxyStyler
  • ProxyWing
  • Proxying
  • Proxyma
  • PuraRoute
  • Q2IP
  • RainProxy
  • RapidProxy
  • RealProxy
  • ResiProxies
  • RoamProxy
  • RolaProxy
  • Shifter
  • Smartproxy
  • SpyderProxy
  • StrikeProxy
  • SwiftProxy
  • TalorData
  • Thordata
  • ThunderProxy
  • TrueProxies
  • TrustProxy
  • VantageProxies
  • VibeProxies
  • VitalData
  • VitalExclusive
  • VitalProxy
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 121.128.0.0/13/24s
VPN GateUniversity of Tsukuba
25<0.01%
25

Lineage

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

121.128.0.0/13

From the registry to its use

  1. Jul 10, 2007
    Route object
    AS17613 KTE Information and Communications
    RADB route object for AS17613 KTE Information and Communications, maintainer MAINT-AS3786
    121.134.160.0/24
  2. Sep 8, 2009– today
    Announced
    AS4766 Korea Telecom
    as part of 121.128.0.0/12
    121.128.0.0/12
  3. Dec 8, 2009– today
    Announced
    AS4766 Korea Telecom
    Internet provider
  4. Feb 21, 2014
    Route object
    AS45990 Health Insurance Review Assessment Service
    RADB route object for AS45990 Health Insurance Review Assessment Service, maintainer MAINT-AS4766
    121.135.156.0/24
  5. Feb 15, 2017
    Route object
    AS9321 Hanyang University
    RADB route object for AS9321 Hanyang University, maintainer MAINT-AS9318
    121.130.148.0/24
  6. Dec 19, 2017
    Route object
    AS9640 Korea Internet Security Agency
    RADB route object for AS9640 Korea Internet Security Agency, maintainer MAINT-AS9318
    121.133.41.0/24
  7. Jun 9, 2020
    Route object
    AS4766 Korea Telecom
    RADB route object for AS4766 Korea Telecom, maintainer MAINT-AS4766
    121.135.170.0/24
  8. today
    Registry record
    Korea Telecom
    ALLOCATED PORTABLE
    121.128.0.0/11
  9. today
    Used
    VPN Gate
    VPN

Announcements

Less specific

Covering announcements

PrefixOriginTypeProxy exitsHolderRPKI
121.128.0.0/12
since Sep 2009
AS4766Residential6,585
328 always on
Korea Telecom
121.128.0.0/11
since Apr 2006
AS4766Residential12,756
617 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
121.128.28.0/24
since May 2012
AS4790BusinessKorea Telecom
121.128.29.0/24
since May 2012
AS4790Business1Korea Telecom
121.128.55.0/24
since Dec 2015
AS9647BusinessKorea Telecom
121.128.97.0/24
since Aug 2024
AS152214BusinessKorea Telecom
121.128.166.0/24
since Apr 2014
AS4790BusinessKorea Telecom
121.128.219.0/24
since Jul 2013
AS9647BusinessKorea Telecom
121.128.224.0/24
since Dec 2021
AS38122BusinessKorea Telecom
121.128.225.0/24
since Dec 2021
AS38122BusinessKorea Telecom
121.129.49.0/24
since Mar 2008
AS9776BusinessKorea Telecom
121.130.46.0/24
since Jul 2006
AS9684BusinessKorea Telecom
121.130.47.0/24
since Jul 2006
AS9684BusinessKorea Telecom
121.131.7.0/24
since Jan 2017
AS10040BusinessKorea Telecom
121.131.7.0/25AS10040BusinessKorea Telecom
121.131.7.128/25AS10040BusinessKorea Telecom
121.131.145.0/24
since Nov 2006
AS38126BusinessKorea Telecom
121.131.216.0/24
since Aug 2024
AS152214Business3Korea Telecom
121.131.217.0/24
since Jan 2007
AS9856BusinessKorea Telecom
121.133.126.0/24
since Dec 2015
AS45401BusinessKorea Telecom
121.133.198.0/24
since Dec 2016
AS38394Business25Korea Telecom
121.133.199.0/24
since Nov 2016
AS38395Business14
1 always on
Korea Telecom
121.133.203.0/24
since Nov 2016
AS38399Business5Korea Telecom
121.133.209.0/24
since Nov 2016
AS38412Business3Korea Telecom
121.134.234.0/24
since Jan 2018
AS18333BusinessKorea Telecom
121.135.53.0/24
since Feb 2016
AS38697BusinessKorea Telecom
121.135.54.0/24
since Feb 2016
AS38697BusinessKorea Telecom
121.135.55.0/24
since Feb 2016
AS38697Business1Korea Telecom
121.135.56.0/24
since Feb 2016
AS38697BusinessKorea Telecom
121.135.57.128/25AS38697BusinessKorea Telecom
121.135.147.0/24
since Jun 2010
AS46002UnknownKorea Telecom
121.135.147.0/25AS46002UnknownKorea Telecom
121.135.147.128/25AS46002UnknownKorea Telecom
121.135.148.0/24
since Jun 2010
AS46002UnknownKorea Telecom
121.135.148.0/25AS46002UnknownKorea Telecom
121.135.148.128/25AS46002UnknownKorea Telecom
121.135.246.0/24
since Oct 2020
AS9696UnknownKorea 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
Residential516,96799%46
Business6,5281.2%27
Unknown7680.15%5
VPNanonymizer25<0.01%25

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