subnet.im

AS3491PCCW Global (HK) Ltd.

Hong Kong SAR ChinaRegistryAPNICTypeT1

As of 26th September 2026, AS3491 (PCCW Global (HK) Ltd.), a tier-1 transit network registered in Hong Kong SAR China with APNIC, originates 507 IPv4 prefixes covering 1.7M addresses and 44 IPv6 prefixes. By IPv4 address space that makes it the 310th-largest of the 79,480 networks we see originating IPv4, and the 4th-largest of 734 in Hong Kong SAR China. It is seen behind 68 upstream networks, most often AS24516 (Virtutel Pty Ltd) and AS58511 (Swoop (Anycast Global Backbone)), and in front of 673 downstream networks. 92% of its announcements have a valid RPKI ROA; 8 are RPKI-invalid. 51% of its routes reach at least 90% of full-feed peers, and 262 prefixes are also originated by another network.

At a glance

IPv4 prefixes

507

IPv6 prefixes

44

IPv4 addresses

1.7M

IPv6 /64s

17.3B

Upstream graph

The networks AS3491 is seen behind, one and two hops out, drawn from real AS paths.

AS3491Toward the internet core
Upstream graph for AS3491: 10 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS3491PCCW Global (HK) …This networkAS2914NTT America, Inc.AS6667Elisa OyjAS24516Virtutel Pty LtdAS58511Swoop (Anycast Gl…AS199524Gcore S.A.AS3130RGnet OUAS49544i3D.net B.VAS3356Lumen (Level 3)AS174Cogent Communicat…AS1299Arelion (fka. Tel…

Networks observed one and two hops upstream of AS3491 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

1,455

adjacent networks

Upstreams
685%
Peers
71449%
Downstreams
67346%

Networks carrying this one's traffic toward the rest of the internet. Listing the 40 seen on the most AS paths, of 68.

Upstreams of AS3491
NetworkCountryRelationshipPathsVantage pts
AS24516Virtutel Pty LtdAUPeer707,3762
AS58511Swoop (Anycast Global Backbone)AUPeer278,8021
AS6667Elisa OyjFIPeer210,2184
AS199524Gcore S.A.LUPeer175,1732
AS2914NTT America, Inc.USPeer154,94369
AS13030Init7 (Switzerland) Ltd.CHPeer149,1375
AS1299Arelion (fka. Telia Carrier)SEPeer133,54762
AS3356Lumen (Level 3)USPeer120,10450
AS3741Dimension DataZAPeer107,2141
AS6453TATA Communications (America) IncUSPeer102,55845

Prefixes

All 551

The largest blocks AS3491 originates, widest first.

Largest prefixes originated by AS3491
PrefixAddressesVisibility
63.216.0.0/13524k59/81
209.8.0.0/15131k81/81
205.177.0.0/1665.5k81/81
205.252.0.0/1665.5k81/81
206.161.0.0/1665.5k81/81
207.226.0.0/1665.5k81/81
207.176.0.0/1732.8k81/81
212.212.128.0/1732.8k81/81
63.220.64.0/1816.4k60/81
63.223.64.0/1816.4k60/81

Routing health

How AS3491'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

  • Valid91.8%506
  • Invalid1.5%8
  • No ROA6.7%37

Propagation

  • Globally propagated90% of full-feed peers or more51.4%283
  • Partially propagated40% to 90%47.2%260
  • Seen by few peersUnder 40%1.5%8

Prefix sizes

IPv4 — 507 prefixes

IPv6 — 44 prefixes

  • /324.3B × /646.8%3
  • /35537M × /6418.2%8
  • /37134M × /642.3%1
  • /4865.5k × /6472.7%32

Recent changes

Announcements that started or stopped since 27th Aug 2026.

18 announced and 15 withdrawn in all; the most recent are shown.

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