Autonomous System
AS21283 — A1SI-AS - A1 Slovenija telekomunikacijske storitve,d.d.(SI)
Last fetched
AS21283 is an Autonomous System operated by A1SI-AS - A1 Slovenija telekomunikacijske storitve,d.d. and registered in SI. As of Sun, 06 Sep 2026 12:51:34 GMT, it announces 21 routed IP prefixes and peers with 37 other Autonomous Systems in the WhisperGraph BGP dataset.
Nutrition Label
Routing footprint
AS21283 announces 21 distinct routed prefixes. The 21-prefix sample below links to per-prefix pages with full conflict and reverse-DNS detail.
Peering ecosystem
37 distinct peers via BGP. The first 37 are listed below.
| Peer ASN | Operator | Country |
|---|---|---|
| AS15822 | AGEN-AS - AGEN-AS | SI |
| AS196846 | ELKATV - A1 Slovenija telekomunikacijske storitve,d.d. | SI |
| AS196895 | ujp-si - ujp-si | SI |
| AS197391 | TOBACNA-LJUBLJANA-SI-AS - TOBACNA-LJUBLJANA-SI-AS | SI |
| AS197907 | AKSON - AKSON, poslovno in informacijsko svetovanje, d.o.o. | SI |
| AS198061 | SI-VALICON - SI-VALICON | SI |
| AS198524 | ILOL - ILOL | SI |
| AS198827 | ELEKTROGORENJSKA-SI - Elektro Gorenjska, podjetje za distribucijo elektricne energije, d.d. | SI |
| AS199612 | BISNODE - BISNODE | SI |
| AS201395 | IT-TIM-AS - IT-TIM d.o.o. | SI |
| AS203618 | UB330-net2 - UB330.net d.o.o. | SI |
| AS210197 | RESITVE-AS - ROK TAJZEL | SI |
| AS213115 | MMITECH-AS - MMITECH d.o.o. | SI |
| AS21401 | BORZEN-AS - BORZEN-AS | SI |
| AS214296 | Betatel - BETATEL LTD | BG |
| AS25059 | NLB-SI-AS - Nova Ljubljanska Banka d.d. | SI |
| AS25066 | NKBM-AS - NKBM-AS | SI |
| AS25467 | AKTON-AS - Akton d.o.o. | SI |
| AS28682 | ASN-POSTA - Posta Slovenije d.o.o. | SI |
| AS28850 | ZZZS-SI-ASN - ZZZS-SI-ASN | SI |
| AS31687 | PPTUJ-AS - Perutnina Ptuj d.d. | SI |
| AS3303 | SWISSCOM - Swisscom (Schweiz) AG | CH |
| AS34367 | BSI-AS - Banka Slovenije | SI |
| AS39727 | ZZI-AS - ZZI d.o.o. | SI |
| AS41505 | delavskahranilnica-si - delavskahranilnica-si | SI |
| AS42473 | AS-ANEXIA - Anexia Cloud Solutions GmbH | AT |
| AS43061 | SI-STELKOM - Stelkom d.o.o. | SI |
| AS44968 | IPROM-AS - IPROM d.o.o | SI |
| AS47917 | RTVSLO-ASN - RTV Slovenija | SI |
| AS47993 | BANKART-SI-AS - BANKART-SI-AS | SI |
| AS48419 | SI-SALUS - SI-SALUS | SI |
| AS48772 | SI-GLOBUS-MARINE-INTERNATIONAL - SI-GLOBUS-MARINE-INTERNATIONAL | SI |
| AS48894 | OPTIMUS-AS - Optimus IT d.o.o. | SI |
| AS49659 | GTS-SKYTOLL-AS - GTS-SKYTOLL-AS | SK |
| AS57517 | POLICIJA-AS - Ministrstvo za notranje zadeve | SI |
| AS6939 | HURRICANE - Hurricane Electric LLC | US |
| AS8447 | A1TELEKOM-AT - A1 Telekom Austria AG | AT |
Blast radius
Count of dependent hostnames if AS21283 disappeared from the routing table.
281,074 hostnames depend on this network.Exact count across all 21 announced prefixes. Snapshot Mon, 06 Jul 2026 09:00:43 GMT.
MOAS / hijack watch
Prefixes routed by AS21283 that another Autonomous System also announces. A non-empty list is one of the strongest BGP-hijack signals available without active probes.
No active MOAS conflicts. Every prefix announced by AS21283 is unique to AS21283 in the current routing snapshot.
Threat posture
Related pages
Pivot deeper into the graph from AS21283.
Cypher and MCP
Reproduce the headline metric directly against graph.whisper.security:
MATCH (a:ASN {name: "AS21283"})-[:HAS_NAME]->(n:ASN_NAME)
OPTIONAL MATCH (a)-[:HAS_COUNTRY]->(c:COUNTRY)
RETURN a.name AS asn, n.name AS operator, c.name AS countryOr query Whisper from your own LLM workflow via the Whisper MCP server.