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AS9848SEJONG NETWORKS

South KoreaRegistryAPNICTypeEyeball

As of 26th September 2026, AS9848 (SEJONG NETWORKS), an access network registered in South Korea with APNIC, originates 220 IPv4 prefixes covering 1.1M addresses and 3 IPv6 prefixes. By IPv4 address space that makes it the 434th-largest of the 79,516 networks we see originating IPv4, and the 9th-largest of 908 in South Korea. It is seen behind 20 upstream networks, most often AS3491 (PCCW Global (HK) Ltd.) and AS15412 (Flag Telecom UK Limited), and in front of 54 downstream networks. None of its announcements have a valid RPKI ROA. 68% of its routes reach at least 90% of full-feed peers.

At a glance

IPv4 prefixes

220

IPv6 prefixes

3

IPv4 addresses

1.1M

IPv6 /64s

8.6B

Upstream graph

The networks AS9848 is seen behind, one and two hops out, drawn from real AS paths.

AS9848Toward the internet core
Upstream graph for AS9848: 12 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS9848SEJONG NETWORKSThis networkAS3491PCCW Global (HK) …AS6453TATA Communicatio…AS15412Flag Telecom UK L…AS23764China Telecom Glo…AS58453China Mobile Inte…AS24516Virtutel Pty LtdAS58511Swoop (Anycast Gl…AS2914NTT America, Inc.AS6939Hurricane Electri…AS7713PT Telkom Indones…AS23673Cogetel Online, C…AS3356Lumen (Level 3)

Networks observed one and two hops upstream of AS9848 in real AS paths. A thicker line means more vantage points saw that adjacency, so weight tracks how well attested it is — not how much traffic it carries. Adjacency is an observation; whether it is a transit purchase or a settlement-free peering is an inference, and is labelled as one wherever we show it.

Neighbouring networks

166

adjacent networks

Upstreams
2012%
Peers
9255%
Downstreams
5433%

Networks carrying this one's traffic toward the rest of the internet.

Upstreams of AS9848
NetworkCountryRelationshipPathsVantage pts
AS3491PCCW Global (HK) Ltd.HKPeer49,266142
AS15412Flag Telecom UK LimitedGBPeer17,132103
AS23764China Telecom GlobalHKPeer16,978110
AS58453China Mobile InternationalHKPeer14,86294
AS6453TATA Communications (America) IncUSPeer13,12381
AS4766Korea TelecomKRPeer3,55788
AS7713PT Telkom Indonesia TbkIDPeer2,4212
AS6939Hurricane Electric LLCUSPeer1,5109
AS49544i3D.net B.VNLPeer1,4071
AS35280F5 Networks SARLFRPeer1,2212

Prefixes

All 223

The largest blocks AS9848 originates, widest first.

Largest prefixes originated by AS9848
PrefixAddressesVisibility
203.227.0.0/1665.5k81/81
203.231.0.0/1665.5k81/81
210.109.0.0/1665.5k81/81
210.122.0.0/1665.5k81/81
61.100.0.0/1732.8k81/81
61.109.128.0/1732.8k81/81
203.235.0.0/1732.8k81/81
203.238.0.0/1732.8k81/81
203.239.0.0/1732.8k81/81
203.243.128.0/1732.8k81/81

Routing health

How AS9848's own announcements validate against RPKI and how far they propagate. The same measures for the whole routing table are on the routing table in numbers.

RPKI origin validation

  • Valid0.0%0
  • Invalid0.0%0
  • No ROA100.0%223

Propagation

  • Globally propagated90% of full-feed peers or more68.2%152
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%31.8%71

Prefix sizes

IPv4 — 220 prefixes

IPv6 — 3 prefixes

  • /324.3B × /6466.7%2
  • /49 and longerAggregated33.3%1

Recent changes

Announcements that started or stopped since 27th Aug 2026.

Routing data derived from RouteViews MRT archives, BGPKIT relationship inference and public registry data.