subnet.im

AS4657StarHub Ltd

SingaporeRegistryAPNICTypeEyeball

As of 10th November 2026, AS4657 (StarHub Ltd), an access network registered in Singapore with APNIC, originates 217 IPv4 prefixes covering 847k addresses and 89 IPv6 prefixes. By IPv4 address space that makes it the 529th-largest of the 80,733 networks we see originating IPv4, and the 3rd-largest of 450 in Singapore. It is seen behind 55 upstream networks, most often AS18106 (Viewqwest Pte Ltd) and AS1299 (Arelion (fka. Telia Carrier)), and in front of 256 downstream networks. Over 99% of its announcements have a valid RPKI ROA, and none are RPKI-invalid. 74% of its routes reach at least 90% of full-feed peers, and 1 prefix is also originated by another network.

At a glance

IPv4 prefixes

217

IPv6 prefixes

89

IPv4 addresses

847k

IPv6 /64s

21.5B

Upstream graph

The networks AS4657 is seen behind, one and two hops out, drawn from real AS paths.

AS4657Toward the internet core
Upstream graph for AS4657: 12 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS4657StarHub LtdThis networkAS1299Arelion (fka. Tel…AS2914NTT America, Inc.AS6939Hurricane Electri…AS9002RETN LimitedAS18106Viewqwest Pte LtdAS13030Init7 (Switzerlan…AS16552Tiggee LLCAS20130Depaul UniversityAS132337AxclusiveAS215859Hetzner Cloud - S…AS3356Lumen (Level 3)AS6667Elisa Oyj

Networks observed one and two hops upstream of AS4657 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

1,286

adjacent networks

Upstreams
554%
Peers
97576%
Downstreams
25620%

Networks carrying this one's traffic toward the rest of the internet. Listing the 40 seen on the most AS paths, of 55.

Upstreams of AS4657
NetworkCountryRelationshipPathsVantage pts
AS18106Viewqwest Pte LtdSGPeer63,2964
AS1299Arelion (fka. Telia Carrier)SEPeer13,67462
AS9002RETN LimitedGBPeer11,02176
AS6939Hurricane Electric LLCUSPeer9,95247
AS2914NTT America, Inc.USPeer8,45648
AS4637Telstra International LimitedHKPeer5,78168
AS2497Internet Initiative Japan Inc.JPPeer3,4865
AS174Cogent Communications, LLCUSPeer2,83862
AS17645NTT Singapore Pte LtdSGPeer2,21716
AS6453TATA Communications (America) IncUSPeer2,12677

Prefixes

All 306

The largest blocks AS4657 originates, widest first.

Largest prefixes originated by AS4657
PrefixAddressesVisibility
171.0.0.0/15131k76/76
101.127.0.0/1665.5k76/76
171.207.0.0/1665.5k76/76
182.55.0.0/1665.5k76/76
203.116.0.0/1665.5k76/76
203.117.0.0/1665.5k76/76
39.109.128.0/1732.8k76/76
122.11.128.0/1732.8k76/76
182.19.128.0/1732.8k76/76
183.90.0.0/1732.8k76/76

Routing health

How AS4657'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

  • Valid99.7%305
  • Invalid0.0%0
  • No ROA0.3%1

Propagation

  • Globally propagated90% of full-feed peers or more73.9%226
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%26.1%80

Prefix sizes

IPv4 — 217 prefixes

IPv6 — 89 prefixes

  • /3017.2B × /641.1%1
  • /324.3B × /641.1%1
  • /4865.5k × /6418.0%16
  • /49 and longerAggregated79.8%71

Recent changes

Announcements that started or stopped since 12th Oct 2026.

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