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Data as of Nov 7, 2026

203.243.128.0/17

512 anonymizer addresses · 1.6% · ISP proxy11 residential-proxy exits · 30 days

Sejong Networks

Announcement
this exact prefix
No RPKI
Announced by
AS9848
Type
Internet provider
80% of it

Residential-proxy exits

Proxy exits
11
0.03% of its addresses · 30 days
Spread
7 of 128
/24s with at least one exit
Providers
17
selling exits here
Oct 8, 2026 – Nov 6, 2026

Exits seen per day

281 observations
  • Residential
  • Hosting
  • Internet provider

/24s with the most always-on exits

/24Always-on exitsProxy exits
203.243.133.0/2405
203.243.130.0/2401
203.243.140.0/2401
203.243.151.0/2401
203.243.156.0/2401
203.243.210.0/2401
203.243.217.0/2401

Proxy providers listing exits

  • BirdProxies
  • BottingTools
  • CliProxy
  • DataImpulse
  • Datarama
  • Evomi
  • IPFly
  • IPPeak
  • InfiniteProxies
  • NodeProxy
  • NovProxy
  • ProxyEmpire
  • ProxyRack
  • PuraRoute
  • RainProxy
  • Shifter
  • ZENPROXY_PREMIUM
IPv4 market

Path

1 · Holder
Sejong Networks
2 · Leased from
not leased
3 · Announced by
AS9848 Sejong Networks
since May 2005 · 21.5 yr ago
4 · Use
Internet provider
anonymizer space, operator not named

Lineage

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

203.243.128.0/17

From the registry to its use

  1. Jan 7, 2005
    Route object
    AS4670 Shinbiro
    REACH route object for AS4670 Shinbiro, maintainer MAINT-REACH-NOC
    203.243.185.0/24
  2. May 9, 2005– today
    Announced
    AS9848 Sejong Networks
    Internet provider
  3. Aug 19, 2005
    Route object
    AS9848 Sejong Networks
    REACH route object for AS9848 Sejong Networks, maintainer MAINT-REACH-NOC
  4. Aug 19, 2005
    Route object
    AS9848 Sejong Networks
    REACH route object for AS9848 Sejong Networks, maintainer MAINT-REACH-NOC
    203.243.253.0/24
  5. Dec 22, 2006
    Route object
    AS23584 Pusan Cable TV System Co., Ltd.
    RADB route object for AS23584 Pusan Cable TV System Co., Ltd., maintainer MAINT-AS3786
    203.243.178.0/24
  6. Dec 22, 2006
    Route object
    AS23584 Pusan Cable TV System Co., Ltd.
    RADB route object for AS23584 Pusan Cable TV System Co., Ltd., maintainer MAINT-AS3786
    203.243.179.0/24
  7. Dec 22, 2006
    Route object
    AS23584 Pusan Cable TV System Co., Ltd.
    RADB route object for AS23584 Pusan Cable TV System Co., Ltd., maintainer MAINT-AS3786
    203.243.180.0/24
  8. Dec 22, 2006
    Route object
    AS23584 Pusan Cable TV System Co., Ltd.
    RADB route object for AS23584 Pusan Cable TV System Co., Ltd., maintainer MAINT-AS3786
    203.243.181.0/24
  9. Jan 5, 2010
    Route object
    AS23584 Pusan Cable TV System Co., Ltd.
    RADB route object for AS23584 Pusan Cable TV System Co., Ltd., maintainer MAINT-AS3786
    203.243.137.0/24
  10. Jan 5, 2010
    Route object
    AS23584 Pusan Cable TV System Co., Ltd.
    RADB route object for AS23584 Pusan Cable TV System Co., Ltd., maintainer MAINT-AS3786
    203.243.223.0/24
  11. Feb 1, 2010
    Route object
    AS9697 LG HelloVision Corp.
    RADB route object for AS9697 LG HelloVision Corp., maintainer MAINT-AS4637
    203.243.144.0/22
  12. Feb 1, 2010
    Route object
    AS9848 Sejong Networks
    RADB route object for AS9848 Sejong Networks, maintainer MAINT-AS4637
    203.243.174.0/23
  13. Feb 1, 2010
    Route object
    AS9848 Sejong Networks
    RADB route object for AS9848 Sejong Networks, maintainer MAINT-AS4637
    203.243.176.0/23
  14. Feb 1, 2010
    Route object
    AS23584 Pusan Cable TV System Co., Ltd.
    RADB route object for AS23584 Pusan Cable TV System Co., Ltd., maintainer MAINT-AS4637
    203.243.178.0/23
  15. Feb 1, 2010
    Route object
    AS23584 Pusan Cable TV System Co., Ltd.
    RADB route object for AS23584 Pusan Cable TV System Co., Ltd., maintainer MAINT-AS4637
    203.243.180.0/23
  16. Feb 1, 2010
    Route object
    AS10155 KOSME
    RADB route object for AS10155 KOSME, maintainer MAINT-AS4637
    203.243.186.0/23
  17. Feb 1, 2010
    Route object
    AS10155 KOSME
    RADB route object for AS10155 KOSME, maintainer MAINT-AS4637
    203.243.188.0/23
  18. Feb 1, 2010
    Route object
    AS10155 KOSME
    RADB route object for AS10155 KOSME, maintainer MAINT-AS4637
    203.243.190.0/24
  19. Feb 1, 2010
    Route object
    AS9697 LG HelloVision Corp.
    RADB route object for AS9697 LG HelloVision Corp., maintainer MAINT-AS4637
    203.243.203.0/24
  20. Feb 1, 2010
    Route object
    AS9697 LG HelloVision Corp.
    RADB route object for AS9697 LG HelloVision Corp., maintainer MAINT-AS4637
    203.243.204.0/22
  21. Feb 1, 2010
    Route object
    AS23584 Pusan Cable TV System Co., Ltd.
    RADB route object for AS23584 Pusan Cable TV System Co., Ltd., maintainer MAINT-AS4637
    203.243.218.0/23
  22. Feb 1, 2010
    Route object
    AS23584 Pusan Cable TV System Co., Ltd.
    RADB route object for AS23584 Pusan Cable TV System Co., Ltd., maintainer MAINT-AS4637
    203.243.220.0/23
  23. Feb 4, 2010
    Route object
    AS23584 Pusan Cable TV System Co., Ltd.
    RADB route object for AS23584 Pusan Cable TV System Co., Ltd., maintainer MAINT-AS4637
    203.243.138.0/23
  24. Jun 15, 2010
    Route object
    AS23584 Pusan Cable TV System Co., Ltd.
    RADB route object for AS23584 Pusan Cable TV System Co., Ltd., maintainer MAINT-AS4637
    203.243.224.0/23
  25. Feb 3, 2011
    Route object
    AS23584 Pusan Cable TV System Co., Ltd.
    RADB route object for AS23584 Pusan Cable TV System Co., Ltd., maintainer MAINT-AS4766
    203.243.218.0/24
  26. Jun 21, 2011
    Route object
    AS18306
    RADB route object for AS18306, maintainer MAINT-AS4637
    203.243.160.0/21
  27. Jun 21, 2011
    Route object
    AS18306
    RADB route object for AS18306, maintainer MAINT-AS4637
    203.243.168.0/22
  28. Feb 15, 2017
    Route object
    AS9848 Sejong Networks
    RADB route object for AS9848 Sejong Networks, maintainer MAINT-AS9318
  29. Dec 29, 2017
    Route object
    AS9845 LG HelloVision Corp.
    RADB route object for AS9845 LG HelloVision Corp., maintainer MAINT-AS4670
    203.243.188.0/23
  30. Dec 29, 2017
    Route object
    AS9845 LG HelloVision Corp.
    RADB route object for AS9845 LG HelloVision Corp., maintainer MAINT-AS4670
    203.243.190.0/24
  31. Jan 2, 2019
    Route object
    AS9770 LG HelloVision Corp.
    RADB route object for AS9770 LG HelloVision Corp., maintainer MAINT-AS9318
    203.243.186.0/24
  32. Jan 2, 2019
    Route object
    AS9770 LG HelloVision Corp.
    RADB route object for AS9770 LG HelloVision Corp., maintainer MAINT-AS9318
    203.243.187.0/24
  33. Jan 2, 2019
    Route object
    AS9770 LG HelloVision Corp.
    RADB route object for AS9770 LG HelloVision Corp., maintainer MAINT-AS9318
    203.243.188.0/24
  34. Jan 2, 2019
    Route object
    AS9770 LG HelloVision Corp.
    RADB route object for AS9770 LG HelloVision Corp., maintainer MAINT-AS9318
    203.243.189.0/24
  35. Jan 2, 2019
    Route object
    AS9770 LG HelloVision Corp.
    RADB route object for AS9770 LG HelloVision Corp., maintainer MAINT-AS9318
    203.243.190.0/24
  36. today
    Registry record
    Sejong Networks
    ALLOCATED PORTABLE
    203.243.128.0/17

Announcements

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
203.243.128.0/21
since Jun 2025
AS9848Internet provider6Sejong Networks
203.243.128.0/24
since Nov 2025
AS141167UnknownSejong Networks
203.243.132.0/24
since Nov 2025
AS141167UnknownSejong Networks
203.243.133.0/24
since Jan 2026
AS136897Hosting5Sejong Networks
203.243.140.0/22
since Jul 2009
AS23584Residential1Sejong Networks
203.243.148.0/22
since Jul 2010
AS23584Residential1Sejong Networks
203.243.150.0/24
since Jan 2010
AS23584ResidentialSejong Networks
203.243.151.0/24
since Jan 2010
AS23584Residential1Sejong Networks
203.243.152.0/22
since Aug 2010
AS23584ResidentialSejong Networks
203.243.152.0/24
since Jan 2010
AS23584ResidentialSejong Networks
203.243.155.0/24
since Aug 2007
AS23584ResidentialSejong Networks
203.243.156.0/24
since Aug 2007
AS23584Residential1Sejong Networks
203.243.217.0/24
since Aug 2007
AS23584Residential1Sejong Networks
203.243.219.0/24
since Aug 2007
AS23584ResidentialSejong Networks
203.243.220.0/24
since Aug 2007
AS23584ResidentialSejong Networks
203.243.221.0/24
since Aug 2007
AS23584ResidentialSejong Networks
203.243.224.0/24
since Jan 2010
AS23584ResidentialSejong Networks
203.243.225.0/24
since Jan 2010
AS23584ResidentialSejong Networks
203.243.237.0/24
since Feb 2010
AS18300BusinessSejong Networks

Composition

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

Announced space

Address share

Announced space

Types across the prefix

32,768 addresses
TypeAddressesShareRanges
Internet provider26,36880%11
Residential4,86415%14
ISP proxyanonymizer5121.6%2
Unknown5121.6%2
Business2560.78%1
Hosting2560.78%1

Network & registry

AnnouncementRouting historyRPKI & IRRWhois & abuse
Origin network

AS9848

KR
Name
Sejong Networks
Type
Internet provider
Registered
Feb 4, 2000
Domain
sejongnetworks.com
Website
en.sejongnetworks.com/
Industry
Internet Service Provider (ISP)
Spamhaus ASN-DROP
not listed