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Data as of Nov 7, 2026

121.144.0.0/13

19 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
3,398
0.65% of its addresses · listed by providers
Always-on exits
133
3.9% of its exits
Spread
1,416 of 2,048
/24s with at least one exit
Providers
106
selling exits here

/24s with the most always-on exits

/24Always-on exitsProxy exits
121.147.83.0/2427
121.149.103.0/2425
121.149.229.0/2425
121.150.64.0/2425
121.145.115.0/2424
121.147.241.0/2424
121.151.146.0/2423
121.147.211.0/2423
121.151.210.0/2422
121.151.238.0/2418
121.148.48.0/2417
121.145.242.0/2417
121.151.10.0/2417
121.151.46.0/2417
121.148.249.0/2416
121.149.221.0/2416
121.150.114.0/2416
121.146.34.0/2416
121.147.240.0/2416
121.148.238.0/2416
121.147.212.0/2416
121.149.193.0/2416
121.148.4.0/2415
121.148.229.0/2415

Proxy providers listing exits

  • 2Captcha
  • 711Proxy
  • 9Proxy
  • Ake.net
  • AnyIP
  • B2Proxy
  • BartProxies
  • BirdProxies
  • BlurPath
  • BottingTools
  • Bright Data
  • BuyingProxy
  • ByteProxies
  • Byteful
  • CatProxies
  • CliProxy
  • CoreProxy
  • DataImpulse
  • Datarama
  • Decodo
  • EZProxies
  • EnigmaProxy
  • Evomi
  • FastProxy
  • FlashProxy
  • FlexyProxies
  • FloppyData
  • GSocks
  • Geonix
  • Geonode
  • GhostConnect
  • GloryCloud
  • GoProxies
  • GonzoProxy
  • HideProxy
  • HydraProxy
  • IPCola
  • IPFly
  • IPOasis
  • IPPeak
  • IPRoyal
  • Infatica
  • InfiniteProxies
  • KindProxy
  • KocerRoxy
  • Kookey
  • LemonBright
  • LemonLabs
  • LemonPrime
  • LightningProxies
  • LudaxProxy
  • MagneticProxy
  • MangoProxy
  • MarsProxies
  • Maskify
  • MoMoProxy
  • NSocks
  • NextProxy
  • NodeMaven
  • NodeProxy
  • NovProxy
  • NovaProxy
  • Novada
  • Oxylabs
  • PROXYWING_BASIC
  • PacketStream
  • PrivateByte
  • Proxies.fo
  • ProxiesVision
  • Proxio
  • Proxiware
  • Proxy-Cheap
  • Proxy-Seller
  • ProxyEmpire
  • ProxyGeo
  • ProxyHat
  • ProxyRack
  • ProxyStyler
  • ProxyWing
  • Proxying
  • Proxyma
  • PuraRoute
  • QUANTICDATA
  • RH7Proxy
  • RainProxy
  • RapidProxy
  • RealProxy
  • ResiProxies
  • RoamProxy
  • RolaProxy
  • Shifter
  • SpyderProxy
  • StrikeProxy
  • SwiftProxy
  • TalorData
  • Thordata
  • ThunderProxy
  • TrueProxies
  • TrustProxy
  • VantageProxies
  • VibeProxies
  • VitalData
  • VitalExclusive
  • VitalProxy
  • 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 121.144.0.0/13/24s
VPN GateUniversity of Tsukuba
19<0.01%
19

Lineage

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

121.144.0.0/13

From the registry to its use

  1. Sep 8, 2009– today
    Announced
    AS4766 Korea Telecom
    as part of 121.144.0.0/12
    121.144.0.0/12
  2. Dec 8, 2009– today
    Announced
    AS4766 Korea Telecom
    Internet provider
  3. Nov 25, 2010
    Route object
    AS55589 Korea Institute of Industrial Technology
    RADB route object for AS55589 Korea Institute of Industrial Technology, maintainer MAINT-AS4766
    121.148.122.0/23
  4. Nov 25, 2010
    Route object
    AS55589 Korea Institute of Industrial Technology
    RADB route object for AS55589 Korea Institute of Industrial Technology, maintainer MAINT-AS4766
    121.148.124.0/22
  5. Oct 29, 2025
    Route object
    AS9870 Dong-EUI University
    RADB route object for AS9870 Dong-EUI University, maintainer MAINT-AS4766
    121.144.0.0/16
  6. today
    Registry record
    Korea Telecom
    ALLOCATED PORTABLE
    121.128.0.0/11
  7. today
    Used
    VPN Gate
    VPN

Announcements

Less specific

Covering announcements

PrefixOriginTypeProxy exitsHolderRPKI
121.144.0.0/12
since Sep 2009
AS4766Residential6,708
287 always on
Korea Telecom
121.128.0.0/11
since Apr 2006
AS4766Residential13,693
626 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
121.144.140.0/22
since Nov 2019
AS9870BusinessKorea Telecom
121.144.140.0/23
since Nov 2019
AS9870BusinessKorea Telecom
121.144.142.0/23
since Nov 2019
AS9870BusinessKorea Telecom
121.144.144.0/22
since Nov 2019
AS9870BusinessKorea Telecom
121.144.144.0/23
since Nov 2019
AS9870BusinessKorea Telecom
121.144.146.0/23
since Nov 2019
AS9870BusinessKorea Telecom
121.144.148.0/23
since Nov 2019
AS9870BusinessKorea Telecom
121.144.148.0/24
since Nov 2019
AS9870BusinessKorea Telecom
121.144.149.0/24
since Nov 2019
AS9870BusinessKorea Telecom
121.144.249.0/24
since Jan 2024
AS18023BusinessKorea Telecom
121.144.250.0/24
since Jan 2024
AS18023BusinessKorea Telecom
121.147.42.0/25AS45986BusinessKorea Telecom
121.147.42.128/25AS45986BusinessKorea Telecom
121.150.39.0/24
since Nov 2008
AS4766Residential1Korea Telecom
121.150.50.0/24
since Dec 2020
AS4766ResidentialKorea Telecom
121.150.105.0/24
since May 2024
AS17588BusinessKorea Telecom
121.151.96.0/24
since May 2021
AS131792BusinessKorea 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
Residential520,429>99%29
Business3,8400.73%12
VPNanonymizer19<0.01%19

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