subnet.im

AS21738Rozint

United StatesRegistryARINTypeEyeball

As of 26th September 2026, AS21738 (Rozint), an access network registered in the United States with ARIN, originates 7 IPv4 prefixes covering 2.6k addresses and 6 IPv6 prefixes. By IPv4 address space that makes it the 23,020th-largest of the 79,516 networks we see originating IPv4, and the 5,799th-largest of 18,424 in the United States. It is seen behind 3 upstream networks, most often AS6939 (Hurricane Electric LLC) and AS32097 (WholeSale Internet, Inc.), and in front of 27 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

7

IPv6 prefixes

6

IPv4 addresses

2.6k

IPv6 /64s

33.8M

Upstream graph

The networks AS21738 is seen behind, one and two hops out, drawn from real AS paths.

AS21738Toward the internet core
Upstream graph for AS21738: 8 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS21738RozintThis networkAS1299Arelion (fka. Tel…AS6939Hurricane Electri…AS32097WholeSale Interne…AS8888xTom Pty LtdAS13030Init7 (Switzerlan…AS18106Viewqwest Pte LtdAS20130Depaul UniversityAS174Cogent Communicat…

Networks observed one and two hops upstream of AS21738 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

74

adjacent networks

Upstreams
34%
Peers
4459%
Downstreams
2736%

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

Upstreams of AS21738
NetworkCountryRelationshipPathsVantage pts
AS6939Hurricane Electric LLCUSPeer2,18771
AS32097WholeSale Internet, Inc.USPeer1,65494
AS1299Arelion (fka. Telia Carrier)SEPeer25477

Prefixes

The largest blocks AS21738 originates, widest first.

Largest prefixes originated by AS21738
PrefixAddressesVisibility
216.40.92.0/221k80/81
2.59.255.0/2425680/81
23.150.40.0/2425680/81
23.150.41.0/2425680/81
43.255.189.0/2425680/81
140.235.156.0/2425680/81
185.125.142.0/2425680/81
2602:2b7:c00::/4016.8M × /6463/64
2602:2b7:d00::/4016.8M × /6463/64
2602:2b7:40::/4865.5k × /6463/64

Routing health

How AS21738'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 — 7 prefixes

IPv6 — 6 prefixes

  • /4016.8M × /6433.3%2
  • /4865.5k × /6466.7%4

Recent changes

Announcements that started or stopped since 28th Aug 2026.

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