subnet.im

AS45753Netsec Limited

Hong Kong SAR ChinaRegistryAPNIC

As of 22nd October 2026, AS45753 (Netsec Limited), a network registered in Hong Kong SAR China with APNIC, originates 458 IPv4 prefixes covering 202k addresses. By IPv4 address space that makes it the 1,316th-largest of the 79,663 networks we see originating IPv4, and the 24th-largest of 734 in Hong Kong SAR China. It is seen behind 2 upstream networks, most often AS963 (N963 PTE. LTD.) and AS58453 (China Mobile International). 91% of its announcements have a valid RPKI ROA; 23 are RPKI-invalid. 95% of its routes reach at least 90% of full-feed peers.

At a glance

IPv4 prefixes

458

IPv6 prefixes

0

IPv4 addresses

202k

IPv6 /64s

0

Upstream graph

The networks AS45753 is seen behind, one and two hops out, drawn from real AS paths.

AS45753Toward the internet core
Upstream graph for AS45753: 6 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS45753Netsec LimitedThis networkAS963N963 PTE. LTD.AS58453China Mobile Inte…AS2914NTT America, Inc.AS3257GTT Communication…AS3356Lumen (Level 3)AS6453TATA Communicatio…

Networks observed one and two hops upstream of AS45753 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

5

adjacent networks

Upstreams
240%
Peers
360%
Downstreams
00%

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

Upstreams of AS45753
NetworkCountryRelationshipPathsVantage pts
AS963N963 PTE. LTD.SGPeer33,55977
AS58453China Mobile InternationalHKPeer31

Prefixes

All 458

The largest blocks AS45753 originates, widest first.

Largest prefixes originated by AS45753
PrefixAddressesVisibility
148.66.0.0/198.2k77/77
182.16.0.0/198.2k77/77
216.118.224.0/198.2k77/77
110.173.48.0/204.1k77/77
112.121.160.0/204.1k77/77
148.66.48.0/204.1k77/77
180.178.32.0/204.1k77/77
182.16.32.0/204.1k3/77
182.16.80.0/204.1k3/77
182.16.112.0/204.1k3/77

Routing health

How AS45753'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

  • Valid91.0%417
  • Invalid5.0%23
  • No ROA3.9%18

Propagation

  • Globally propagated90% of full-feed peers or more95.0%435
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%5.0%23

Prefix sizes

IPv4 — 458 prefixes

Recent changes

Announcements that started or stopped since 22nd Sept 2026.

  • Announced103.91.10.0/2415th Oct 2026
  • Announced103.91.11.0/2415th Oct 2026
  • Announced103.91.8.0/2415th Oct 2026
  • Announced103.91.9.0/2415th Oct 2026
  • Withdrawn52.128.255.0/2415th Oct 2026
  • Withdrawn103.1.227.0/2414th Oct 2026
  • Withdrawn103.91.10.0/2414th Oct 2026
  • Withdrawn103.91.11.0/2414th Oct 2026
  • Withdrawn103.91.8.0/2414th Oct 2026
  • Withdrawn103.91.9.0/2414th Oct 2026
  • Withdrawn123.253.24.0/2414th Oct 2026
  • Withdrawn123.253.25.0/2414th Oct 2026

5 announced and 8 withdrawn in all; the most recent are shown.

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