subnet.im

AS21215UNITED GROUP NETWORK INFRASTRUCTURE d.o.o. Beograd

SerbiaRegistryRIPE NCC

As of 11th November 2026, AS21215 (UNITED GROUP NETWORK INFRASTRUCTURE…), a network registered in Serbia with RIPE NCC, originates 10 IPv4 prefixes covering 13.1k addresses and 1 IPv6 prefix. By IPv4 address space that makes it the 9,284th-largest of the 80,743 networks we see originating IPv4, and the 17th-largest of 160 in Serbia. It is seen behind 48 upstream networks, most often AS3356 (Lumen (Level 3)) and AS174 (Cogent Communications, LLC), and in front of 10 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

10

IPv6 prefixes

1

IPv4 addresses

13.1k

IPv6 /64s

34.4B

Upstream graph

The networks AS21215 is seen behind, one and two hops out, drawn from real AS paths.

AS21215Toward the internet core
Upstream graph for AS21215: 12 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS21215UNITED GROUP NETW…This networkAS174Cogent Communicat…AS1299Arelion (fka. Tel…AS3356Lumen (Level 3)AS6830Liberty Global Eu…AS7713PT Telkom Indones…AS151326DCConnect Communi…AS13030Init7 (Switzerlan…AS16552Tiggee LLCAS2914NTT America, Inc.AS3549Lumen (fka. Globa…AS6453TATA Communicatio…AS35280F5 Networks SARL

Networks observed one and two hops upstream of AS21215 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

965

adjacent networks

Upstreams
485%
Peers
90794%
Downstreams
101%

Networks carrying this one's traffic toward the rest of the internet. Listing the 40 seen on the most AS paths, of 48.

Upstreams of AS21215
NetworkCountryRelationshipPathsVantage pts
AS3356Lumen (Level 3)USPeer3,85337
AS174Cogent Communications, LLCUSPeer3,81522
AS1299Arelion (fka. Telia Carrier)SEPeer3,49640
AS7713PT Telkom Indonesia TbkIDPeer5173
AS6830Liberty Global Europe Holding B.V.EUPeer4713
AS13030Init7 (Switzerland) Ltd.CHPeer4555
AS132337AxclusiveSGAdjacent3992
AS49544i3D.net B.VNLPeer3663
AS8455atom86 BVNLPeer3402
AS8551Bezeq International Ltd.ILPeer3061

Prefixes

The largest blocks AS21215 originates, widest first.

Largest prefixes originated by AS21215
PrefixAddressesVisibility
213.244.208.0/204.1k75/76
89.207.192.0/212k75/76
176.109.136.0/212k75/76
185.13.8.0/221k75/76
185.18.12.0/221k75/76
185.20.36.0/221k76/76
185.81.60.0/221k75/76
5.22.163.0/2425675/76
5.22.166.0/2425675/76
5.22.167.0/2425675/76

Routing health

How AS21215'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%11
  • Invalid0.0%0
  • No ROA0.0%0

Propagation

  • Globally propagated90% of full-feed peers or more100.0%11
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%0.0%0

Prefix sizes

IPv4 — 10 prefixes

IPv6 — 1 prefixes

  • /2934.4B × /64100.0%1

Recent changes

Announcements that started or stopped since 12th Oct 2026.

No announcement by AS21215 started or stopped in this period.

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