subnet.im

AS17645NTT Singapore Pte Ltd

SingaporeRegistryAPNICTypeCarrier

As of 26th September 2026, AS17645 (NTT Singapore Pte Ltd), a transit carrier registered in Singapore with APNIC, originates 12 IPv4 prefixes covering 87.3k addresses and 1 IPv6 prefix. By IPv4 address space that makes it the 2,601st-largest of the 79,480 networks we see originating IPv4, and the 16th-largest of 446 in Singapore. It is seen behind 7 upstream networks, most often AS2914 (NTT America, Inc.) and AS3491 (PCCW Global (HK) Ltd.), and in front of 12 downstream networks. Every one of its announcements has a valid RPKI ROA, and none are RPKI-invalid. 100% of its routes reach at least 90% of full-feed peers.

At a glance

IPv4 prefixes

12

IPv6 prefixes

1

IPv4 addresses

87.3k

IPv6 /64s

4.3B

Upstream graph

The networks AS17645 is seen behind, one and two hops out, drawn from real AS paths.

AS17645Toward the internet core
Upstream graph for AS17645: 12 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS17645NTT Singapore Pte…This networkAS2914NTT America, Inc.AS3491PCCW Global (HK) …AS4637Telstra Internati…AS4657StarHub LtdAS32590Valve CorporationAS3130RGnet OUAS49544i3D.net B.VAS24516Virtutel Pty LtdAS58511Swoop (Anycast Gl…AS16552Tiggee LLCAS1299Arelion (fka. Tel…AS6939Hurricane Electri…

Networks observed one and two hops upstream of AS17645 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

38

adjacent networks

Upstreams
718%
Peers
1950%
Downstreams
1232%

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

Upstreams of AS17645
NetworkCountryRelationshipPathsVantage pts
AS2914NTT America, Inc.USPeer2,87773
AS3491PCCW Global (HK) Ltd.HKPeer1,24176
AS4637Telstra International LimitedHKPeer56980
AS32590Valve CorporationUSPeer592
AS4657StarHub LtdSGPeer362
AS4826Vocus Connect International BackboneAUPeer142
AS3741Dimension DataZAAdjacent33

Prefixes

The largest blocks AS17645 originates, widest first.

Largest prefixes originated by AS17645
PrefixAddressesVisibility
116.51.0.0/1665.5k80/81
58.65.0.0/198.2k80/81
202.136.160.0/198.2k80/81
58.65.16.0/221k80/81
175.28.8.0/221k80/81
202.136.188.0/221k80/81
58.65.24.0/2351280/81
116.51.8.0/2351280/81
202.136.168.0/2351280/81
116.51.4.0/2425680/81

Routing health

How AS17645'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

  • Valid100.0%13
  • Invalid0.0%0
  • No ROA0.0%0

Propagation

  • Globally propagated90% of full-feed peers or more100.0%13
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%0.0%0

Prefix sizes

IPv4 — 12 prefixes

IPv6 — 1 prefixes

  • /324.3B × /64100.0%1

Recent changes

Announcements that started or stopped since 27th Aug 2026.

No announcement by AS17645 started or stopped in this period.

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