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Data as of Nov 8, 2026

203.236.128.0/18

3,840 anonymizer addresses · 23% · ISP proxy5 residential-proxy exits · 30 days

Sejong Networks

Announcement
this exact prefix
No RPKI
Announced by
AS9848
Type
Internet provider
59% of it

Residential-proxy exits

Proxy exits
5
0.03% of its addresses · 30 days
Spread
4 of 64
/24s with at least one exit
Providers
3
selling exits here
Oct 9, 2026 – Nov 7, 2026

Exits seen per day

61 observations
  • ISP proxy · anonymizer
  • Residential

/24s with the most always-on exits

/24Always-on exitsProxy exits
203.236.149.0/2402
203.236.155.0/2402
203.236.145.0/2401
203.236.190.0/2401

Proxy providers listing exits

  • Ake.net
  • DataImpulse
  • EVOPROXY
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
Proxy providersnamed Novada, SkyQuantum, LumiProxy
Internet provider

Operators, sellers and brokers

Proxy providers

NameParentIn 203.236.128.0/18/24sRole
Novada
3,84023%
15
Sells it
SkyQuantum
1,2807.8%
5
Runs it
LumiProxy
7684.7%
3
Sells it
Runs itSells it

Lineage

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

203.236.128.0/18

From the registry to its use

  1. May 9, 2005– today
    Announced
    AS9848 Sejong Networks
    Internet provider
  2. Aug 19, 2005
    Route object
    AS9848 Sejong Networks
    REACH route object for AS9848 Sejong Networks, maintainer MAINT-REACH-NOC
  3. Aug 19, 2005
    Route object
    AS9848 Sejong Networks
    REACH route object for AS9848 Sejong Networks, maintainer MAINT-REACH-NOC
    203.236.170.0/24
  4. Aug 19, 2005
    Route object
    AS9848 Sejong Networks
    REACH route object for AS9848 Sejong Networks, maintainer MAINT-REACH-NOC
    203.236.182.0/23
  5. Aug 19, 2005
    Route object
    AS9848 Sejong Networks
    REACH route object for AS9848 Sejong Networks, maintainer MAINT-REACH-NOC
    203.236.184.0/23
  6. Aug 19, 2005
    Route object
    AS9848 Sejong Networks
    REACH route object for AS9848 Sejong Networks, maintainer MAINT-REACH-NOC
    203.236.186.0/24
  7. Oct 24, 2006
    Route object
    AS9848 Sejong Networks
    REACH route object for AS9848 Sejong Networks, maintainer MAINT-REACH-NOC
    203.236.181.0/24
  8. Feb 1, 2010
    Route object
    AS9848 Sejong Networks
    RADB route object for AS9848 Sejong Networks, maintainer MAINT-AS4637
  9. Jun 30, 2010
    Route object
    AS9848 Sejong Networks
    RADB route object for AS9848 Sejong Networks, maintainer MAINT-AS4766
    203.236.174.0/24
  10. Jul 11, 2014
    Route object
    AS17594 SMBS
    RADB route object for AS17594 SMBS, maintainer MAINT-AS4766
    203.236.173.0/24
  11. Feb 15, 2017
    Route object
    AS9318 SK Broadband Co Ltd
    RADB route object for AS9318 SK Broadband Co Ltd, maintainer MAINT-AS9318
    203.236.132.0/24
  12. Dec 29, 2017
    Route object
    AS9845 LG HelloVision Corp.
    RADB route object for AS9845 LG HelloVision Corp., maintainer MAINT-AS4670
    203.236.137.0/24
  13. Jan 2, 2019
    Route object
    AS9770 LG HelloVision Corp.
    RADB route object for AS9770 LG HelloVision Corp., maintainer MAINT-AS9318
    203.236.137.0/24
  14. Jul 24, 2019
    Route object
    AS9848 Sejong Networks
    RADB route object for AS9848 Sejong Networks, maintainer MAINT-AS58453
    203.236.164.0/24
  15. Jun 12, 2020
    Route object
    AS55609 Financial Security Institute
    RADB route object for AS55609 Financial Security Institute, maintainer MAINT-AS9318
    203.236.164.0/24
  16. Nov 17, 2020
    Route object
    AS198949 Radware Ltd
    RADB route object for AS198949 Radware Ltd, maintainer MAINT-AS198949
    203.236.164.0/24
  17. today
    Registry record
    Sejong Networks
    ALLOCATED PORTABLE
    203.236.128.0/18
  18. today
    Used
    Novada
    Proxy seller
  19. today
    Used
    SkyQuantum
    Proxy seller
  20. today
    Used
    LumiProxy
    Proxy seller

Announcements

More specific

Announcements inside

PrefixOriginTypeAnonymizer addressesOperatorProxy exitsHolderRPKI
203.236.135.0/24
since Dec 2016
AS9845ResidentialSejong Networks
203.236.144.0/20
since Jan 2025
AS9848ISP proxy3,84094%Proxy providersoperated by SkyQuantumsold by Novada, LumiProxy5Sejong Networks
203.236.146.0/24
since Feb 2025
AS138195HostingSejong Networks
203.236.162.0/24
since Nov 2025
AS23588HostingSejong Networks
203.236.176.0/22
since Jun 2023
AS9973UnknownSejong Networks
203.236.188.0/22
since Dec 2005
AS23584Residential1Sejong Networks

Composition

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

Announced space

Address share

Announced space

Types across the prefix

16,384 addresses
TypeAddressesShareRanges
Internet provider9,72859%5
ISP proxyanonymizer3,84023%14
Residential1,2807.8%2
Unknown1,0246.3%1
Hosting5123.1%2

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