subnet.im

AS4842Tianhai InfoTech

ChinaRegistryAPNIC

As of 26th September 2026, AS4842 (Tianhai InfoTech), a network registered in China with APNIC, originates 1 IPv4 prefix covering 256 addresses and 8 IPv6 prefixes. By IPv4 address space that makes it the 59,122nd-largest of the 79,516 networks we see originating IPv4, and the 525th-largest of 607 in China. It is seen behind 12 upstream networks, most often AS6939 (Hurricane Electric LLC) and AS20473 (The Constant Company, LLC), and in front of 6 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

1

IPv6 prefixes

8

IPv4 addresses

256

IPv6 /64s

36.3M

Upstream graph

The networks AS4842 is seen behind, one and two hops out, drawn from real AS paths.

AS4842Toward the internet core
Upstream graph for AS4842: 12 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS4842Tianhai InfoTechThis networkAS4635HKIX Route ServersAS6939Hurricane Electri…AS20473The Constant Comp…AS49544i3D.net B.VAS53356Free Range Cloud …AS7713PT Telkom Indones…AS18106Viewqwest Pte LtdAS20130Depaul UniversityAS1299Arelion (fka. Tel…AS2914NTT America, Inc.AS3356Lumen (Level 3)AS807FORK SYSTEMS

Networks observed one and two hops upstream of AS4842 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

50

adjacent networks

Upstreams
1224%
Peers
3264%
Downstreams
612%

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

Upstreams of AS4842
NetworkCountryRelationshipPathsVantage pts
AS6939Hurricane Electric LLCUSPeer1,30064
AS20473The Constant Company, LLCUSPeer302145
AS53356Free Range Cloud Hosting Inc.CAPeer9452
AS4635HKIX Route ServersHKPeer2525
AS49544i3D.net B.VNLPeer243
AS24482SG.GSSGPeer181
AS9002RETN LimitedGBPeer92
AS58511Swoop (Anycast Global Backbone)AUPeer92
AS35280F5 Networks SARLFRPeer21
AS3130RGnet OUEEPeer21

Prefixes

The largest blocks AS4842 originates, widest first.

Largest prefixes originated by AS4842
PrefixAddressesVisibility
45.9.11.0/2425681/81
2401:20::/4016.8M × /6463/64
2a0e:aa06::/4016.8M × /6463/64
2a13:1800:80::/441M × /6463/64
2a13:1800:300::/441M × /6463/64
2401:20:1330::/46262k × /6464/64
2401:20:2104::/46262k × /6462/64
2a13:1800::/4865.5k × /6463/64
2a13:1800:10::/4865.5k × /6464/64

Routing health

How AS4842'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%9
  • Invalid0.0%0
  • No ROA0.0%0

Propagation

  • Globally propagated90% of full-feed peers or more100.0%9
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%0.0%0

Prefix sizes

IPv4 — 1 prefixes

IPv6 — 8 prefixes

  • /4016.8M × /6425.0%2
  • /441M × /6425.0%2
  • /46262k × /6425.0%2
  • /4865.5k × /6425.0%2

Recent changes

Announcements that started or stopped since 27th Aug 2026.

No announcement by AS4842 started or stopped in this period.

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