AS28949
Technical University of Sofia
Reputation · trust score
A transparent 0–100 signal. Every entity starts at a neutral baseline of 65; threat-intel blocklists, exposure, reverse-DNS, routing and allocation each adjust it up or down. Higher is more trustworthy.
- Baseline (neutral) 65
- Academic allocation +6
- Trust score 71 / 100
Experimental · trust-vectors model v1.2.0 — a transparent heuristic, not a definitive verdict. How it works →
Top CIDR ranges
| CIDR | IPs | PTR Density | Organization | Country | State | City |
|---|---|---|---|---|---|---|
| 81.161.240.0/20 | 4.1K |
66.3%
|
Technical University of Sofia | BG | — | — |
BGP Announced Prefixes
Live BGP anomalies →Prefixes AS28949 actually originates in BGP, observed across our RIPE RIS collectors. This live routing view can differ from the registry allocation above.
| Prefix | Announcement samples | Last seen |
|---|---|---|
| 81.161.248.0/24 | 8,929 | 2026-08-01 21:29:36 |
| 81.161.240.0/20 | 8,926 | 2026-08-01 21:29:36 |
| 81.161.255.0/24 | 8,926 | 2026-08-01 21:29:36 |
| 81.161.246.0/24 | 8,926 | 2026-08-01 21:29:36 |
| 81.161.250.0/24 | 8,922 | 2026-08-01 21:29:36 |
| 81.161.252.0/24 | 8,921 | 2026-08-01 21:29:36 |
| 81.161.244.0/24 | 8,918 | 2026-08-01 21:29:36 |
| 81.161.251.0/24 | 8,918 | 2026-08-01 21:29:36 |
| 81.161.254.0/24 | 8,917 | 2026-08-01 21:29:36 |
| 81.161.253.0/24 | 8,914 | 2026-08-01 21:29:36 |
| 81.161.243.0/24 | 8,912 | 2026-08-01 21:29:36 |
| 81.161.249.0/24 | 8,907 | 2026-08-01 21:29:36 |
| 81.161.247.0/24 | 8,907 | 2026-08-01 21:29:36 |
| 81.161.241.0/24 | 8,905 | 2026-08-01 21:29:36 |
| 81.161.242.0/24 | 8,903 | 2026-08-01 21:29:36 |
| 81.161.245.0/24 | 8,903 | 2026-08-01 21:29:36 |
| 81.161.240.0/24 | 8,900 | 2026-08-01 21:29:36 |
Frequently Asked Questions
What is AS28949?
AS28949 is an Autonomous System Number assigned to Technical University of Sofia. An ASN identifies a network that controls a specific set of IP addresses and determines how traffic is routed across the internet via BGP (Border Gateway Protocol).
How many IP addresses does AS28949 announce?
AS28949 announces 4.1K IPv4 addresses distributed across 1 routed CIDR prefixes. The network is registered in Bulgaria.
Who operates AS28949?
AS28949 is operated by Technical University of Sofia. The organization is based in Bulgaria. You can view all IP ranges and related ASNs on the organization page.
What country is AS28949 registered in?
AS28949 is registered in Bulgaria. This indicates where the network operator is headquartered, though the IP addresses it announces may serve users globally.
