subnet.im

AS21738Rozint

United StatesRegistryARINTypeEyeball

As of 10th November 2026, AS21738 (Rozint), an access network registered in the United States with ARIN, originates 9 IPv4 prefixes covering 3.1k addresses and 7 IPv6 prefixes. By IPv4 address space that makes it the 20,470th-largest of the 80,733 networks we see originating IPv4, and the 5,577th-largest of 18,751 in the United States. It is seen behind 4 upstream networks, most often AS6939 (Hurricane Electric LLC) and AS32097 (WholeSale Internet, Inc.), and in front of 30 downstream networks. Every one of its announcements has a valid RPKI ROA, and none are RPKI-invalid. 88% of its routes reach at least 90% of full-feed peers.

At a glance

IPv4 prefixes

9

IPv6 prefixes

7

IPv4 addresses

3.1k

IPv6 /64s

33.9M

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: 11 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS21738RozintThis networkAS1299Arelion (fka. Tel…AS3257GTT Communication…AS6939Hurricane Electri…AS32097WholeSale Interne…AS13030Init7 (Switzerlan…AS16552Tiggee LLCAS6667Elisa OyjAS398465Rackdog LLCAS20130Depaul UniversityAS132337AxclusiveAS174Cogent 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

84

adjacent networks

Upstreams
45%
Peers
5060%
Downstreams
3036%

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

Upstreams of AS21738
NetworkCountryRelationshipPathsVantage pts
AS6939Hurricane Electric LLCUSPeer2,27170
AS32097WholeSale Internet, Inc.USPeer1,31091
AS1299Arelion (fka. Telia Carrier)SEPeer14455
AS3257GTT Communications Inc.USPeer11132

Prefixes

The largest blocks AS21738 originates, widest first.

Largest prefixes originated by AS21738
PrefixAddressesVisibility
216.40.92.0/221k76/76
2.59.255.0/2425675/76
23.150.40.0/2425675/76
23.150.41.0/2425675/76
23.160.200.0/2425655/76
23.160.201.0/2425620/76
43.255.189.0/2425675/76
140.235.156.0/2425676/76
185.125.142.0/2425676/76
2602:2b7:c00::/4016.8M × /6462/63

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%16
  • Invalid0.0%0
  • No ROA0.0%0

Propagation

  • Globally propagated90% of full-feed peers or more87.5%14
  • Partially propagated40% to 90%6.3%1
  • Seen by few peersUnder 40%6.3%1

Prefix sizes

IPv4 — 9 prefixes

IPv6 — 7 prefixes

  • /4016.8M × /6428.6%2
  • /4865.5k × /6471.4%5

Recent changes

Announcements that started or stopped since 12th Oct 2026.

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