Home ASN LookupAS28949

AS28949 TUSNET-AS Technical University of Sofia

🇧🇬

Org handle: ORG-TUOS2-RIPE

8, Kliment Ohridski St.

RIPE NCCallocated

Announced Prefixes (BGP)

17total

17 IPv40 IPv6

IPv4 Addresses

Allocated (RIR)4,096

Announced (BGP)8,192

IPv6 Addresses

Allocated (RIR)0

Announced (BGP)0

Prefix Limit (IPv4)

Prefix Limit (IPv6)

Country

🇧🇬 BG

RIR

RIPE NCC

Status

allocated

Allocated

2003-04-16

Announced Prefixes

(BGP)17

Prefix	RPKI	IRR	Last Seen
81.161.240.0/20	Valid	RIPE	2026-10-09
81.161.240.0/24	Valid	RIPE	2026-10-09
81.161.241.0/24	Valid	RIPE	2026-10-09
81.161.242.0/24	Valid	RIPE	2026-10-09
81.161.243.0/24	Valid	RIPE	2026-10-09
81.161.244.0/24	Valid	RIPE	2026-10-09
81.161.245.0/24	Valid	RIPE	2026-10-09
81.161.246.0/24	Valid	RIPE	2026-10-09
81.161.247.0/24	Valid	RIPE	2026-10-09
81.161.248.0/24	Valid	RIPE	2026-10-09

1-10 of 17

1 / 2

Allocated Prefixes

(RIR)1

Prefix	Country	RIR	Status
81.161.240.0/20	🇧🇬 BG	RIPENCC	assigned

All 17 announced prefixes of AS28949 →

BGP Neighbours

(seen in AS paths)

Upstreams (2)

Networks AS28949 hands its own prefixes to: transit providers, or peers at an exchange.

AS8717A1BG A1 Bulgaria EAD10
AS6802UNICOM B Bulgarian Research And Education Network Association (BREN)7

ASPA

No ASPA

Abuse Contact

External Links

RIPE Whois RIPEstat

Learn more

What is an ASN?Autonomous systems, ASN ranges and how they are assigned
RPKI and route origin validationWhat the RPKI badges on the prefix list mean
ASPA explainedWhy AS28949 should publish an ASPA object
IPv4 transfers in the RIPE NCC regionMonthly volume and the latest registry transfers
ASN data in AI agents and SIEMMCP server and API integrations

API

Open

GEThttps://api.ipctl.io/v1/asn/28949

Returns ASN details, announced prefixes, and BGP routing data.

curl -s "https://api.ipctl.io/v1/asn/28949" | jq