subnet.im

AS9457DREAMLINE CO.

South KoreaRegistryAPNIC

As of 26th September 2026, AS9457 (DREAMLINE CO.), a network registered in South Korea with APNIC, originates 119 IPv4 prefixes covering 918k addresses and 1 IPv6 prefix. By IPv4 address space that makes it the 492nd-largest of the 79,480 networks we see originating IPv4, and the 10th-largest of 908 in South Korea. It is seen behind 14 upstream networks, most often AS2914 (NTT America, Inc.) and AS174 (Cogent Communications, LLC), and in front of 39 downstream networks. 23% of its announcements have a valid RPKI ROA; 8 are RPKI-invalid. 91% of its routes reach at least 90% of full-feed peers, and 2 prefixes are also originated by another network.

At a glance

IPv4 prefixes

119

IPv6 prefixes

1

IPv4 addresses

918k

IPv6 /64s

4.3B

Upstream graph

The networks AS9457 is seen behind, one and two hops out, drawn from real AS paths.

AS9457Toward the internet core
Upstream graph for AS9457: 12 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS9457DREAMLINE CO.This networkAS174Cogent Communicat…AS2914NTT America, Inc.AS4637Telstra Internati…AS6939Hurricane Electri…AS18106Viewqwest Pte LtdAS1299Arelion (fka. Tel…AS151326DCConnect Communi…AS3130RGnet OUAS49544i3D.net B.VAS16552Tiggee LLCAS32590Valve CorporationAS20130Depaul University

Networks observed one and two hops upstream of AS9457 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

121

adjacent networks

Upstreams
1412%
Peers
6856%
Downstreams
3932%

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

Upstreams of AS9457
NetworkCountryRelationshipPathsVantage pts
AS2914NTT America, Inc.USPeer22,42697
AS174Cogent Communications, LLCUSPeer19,155139
AS4637Telstra International LimitedHKPeer4,022115
AS6939Hurricane Electric LLCUSPeer6468
AS18106Viewqwest Pte LtdSGPeer3882
AS3786LG DACOM CorporationKRPeer34470
AS4775Globe TelecomsPHPeer1271
AS35280F5 Networks SARLFRPeer1131
AS49544i3D.net B.VNLPeer1131
AS9002RETN LimitedGBPeer1131

Prefixes

All 120

The largest blocks AS9457 originates, widest first.

Largest prefixes originated by AS9457
PrefixAddressesVisibility
61.103.0.0/1665.5k80/81
61.107.0.0/1665.5k80/81
121.53.0.0/1665.5k80/81
125.57.0.0/1665.5k80/81
211.175.0.0/1665.5k80/81
211.183.0.0/1665.5k80/81
211.249.0.0/1665.5k80/81
220.64.0.0/1665.5k80/81
220.230.0.0/1665.5k80/81
61.96.0.0/1732.8k80/81

Routing health

How AS9457'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

  • Valid22.5%27
  • Invalid6.7%8
  • No ROA70.8%85

Propagation

  • Globally propagated90% of full-feed peers or more90.8%109
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%9.2%11

Prefix sizes

IPv4 — 119 prefixes

IPv6 — 1 prefixes

  • /324.3B × /64100.0%1

Recent changes

Announcements that started or stopped since 27th Aug 2026.

  • Announced109.66.141.0/2422nd Sept 2026
  • Announced49.254.80.0/2422nd Sept 2026
  • Announced69.33.234.0/2422nd Sept 2026
  • Withdrawn103.25.124.0/2421st Sept 2026
  • Withdrawn151.247.100.0/2421st Sept 2026
  • Withdrawn193.168.186.0/2321st Sept 2026
  • Withdrawn45.15.104.0/2321st Sept 2026

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