subnet.im

AS21283A1 Slovenija d.d.

SloveniaRegistryRIPE NCCTypeEyeball

As of 27th September 2026, AS21283 (A1 Slovenija d.d.), an access network registered in Slovenia with RIPE NCC, originates 18 IPv4 prefixes covering 330k addresses and 3 IPv6 prefixes. By IPv4 address space that makes it the 922nd-largest of the 79,536 networks we see originating IPv4, and the 4th-largest of 262 in Slovenia. It is seen behind 8 upstream networks, most often AS8447 (A1 Telekom Austria AG) and AS6939 (Hurricane Electric LLC), and in front of 31 downstream networks. Every one of its announcements has a valid RPKI ROA, and none are RPKI-invalid. 95% of its routes reach at least 90% of full-feed peers.

At a glance

IPv4 prefixes

18

IPv6 prefixes

3

IPv4 addresses

330k

IPv6 /64s

73B

Upstream graph

The networks AS21283 is seen behind, one and two hops out, drawn from real AS paths.

AS21283Toward the internet core
Upstream graph for AS21283: 12 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS21283A1 Slovenija d.d.This networkAS3303Swisscom (Schweiz…AS6939Hurricane Electri…AS8447A1 Telekom Austri…AS43061Stelkom d.o.o.AS132337AxclusiveAS2914NTT America, Inc.AS18106Viewqwest Pte LtdAS20130Depaul UniversityAS3356Lumen (Level 3)AS174Cogent Communicat…AS1299Arelion (fka. Tel…AS6663Türk Telekom Inte…

Networks observed one and two hops upstream of AS21283 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

93

adjacent networks

Upstreams
89%
Peers
5458%
Downstreams
3133%

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

Upstreams of AS21283
NetworkCountryRelationshipPathsVantage pts
AS8447A1 Telekom Austria AGATPeer4,100147
AS6939Hurricane Electric LLCUSPeer9826
AS3303Swisscom (Schweiz) AGCHPeer281
AS43061Stelkom d.o.o.SIPeer2525
AS132337AxclusiveSGPeer252
AS28682Posta Slovenije d.o.o.SIPeer63
AS22356Durand do Brasil LtdaBRPeer11
AS262355VSX NetworksBRPeer11

Prefixes

The largest blocks AS21283 originates, widest first.

Largest prefixes originated by AS21283
PrefixAddressesVisibility
46.122.0.0/15131k82/82
146.212.0.0/1665.5k82/82
90.157.128.0/1732.8k82/82
92.37.0.0/1732.8k82/82
46.164.0.0/1816.4k82/82
85.10.0.0/198.2k82/82
212.18.32.0/198.2k82/82
213.157.224.0/198.2k82/82
62.84.224.0/204.1k82/82
80.95.224.0/204.1k82/82

Routing health

How AS21283'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%21
  • Invalid0.0%0
  • No ROA0.0%0

Propagation

  • Globally propagated90% of full-feed peers or more95.2%20
  • Partially propagated40% to 90%4.8%1
  • Seen by few peersUnder 40%0.0%0

Prefix sizes

IPv4 — 18 prefixes

IPv6 — 3 prefixes

  • /2934.4B × /6466.7%2
  • /324.3B × /6433.3%1

Recent changes

Announcements that started or stopped since 28th Aug 2026.

  • Announced2001:15c0::/2924th Sept 2026
  • Announced2a00:1a20::/2924th Sept 2026
  • Announced2a00:1a20::/3224th Sept 2026
  • Withdrawn2001:15c0::/2921st Sept 2026
  • Withdrawn2a00:1a20::/2921st Sept 2026
  • Withdrawn2a00:1a20::/3221st Sept 2026

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