Data as of Nov 7, 2026
81.161.255.0/24
No anonymizer space · no proxy exits in 30 daysTechnical University of Sofia
Announcements
Less specific
Covering announcements
| Prefix | Origin | Type | Proxy exits | Holder | RPKI |
|---|---|---|---|---|---|
| 81.161.240.0/20 since May 2025 | AS28949 | Business | 40 1 always on | Technical University of Sofia |
Network & registry
Origin network
AS28949
BG
- Name
- Technical University of Sofia
- Type
- Education
- Registered
- Apr 16, 2003
- Domain
- tu-sofia.bg
- Industry
- Colleges, Universities, and Professional Schools
- Spamhaus ASN-DROP
- not listed
Routing timeline
Covering aggregate above, the prefix's own history below
Summary
Routing history
- Pattern
- Reactivated
- First seen
- Nov 2006
- Current origin since
- Jun 2025 · 1.4 yr
- Origin networks
- 2
- Last change of origin
- Jun 2025
Recorded history
History
- Handoffs
- 2
RPKI
Route origin authorizations
| ROA prefix | ASN | Max len | Anchor | Verdict |
|---|---|---|---|---|
| 81.161.255.0/24 | AS28949 | /24 | RIPE | RPKI valid |
| 81.161.240.0/20 | AS28949 | /20 | RIPE | Too specific |
IRR
Route objects on the exact prefix
| Origin | Registry | Description | Maintainer | Modified |
|---|---|---|---|---|
| AS28949 | RIPE | Technical University - Sofia | TUSOFIA-MNT | Nov 13, 2006 |
Whois
Registration for this announcement
- Range
- 81.
161. 240. 0/ 20 - Netname
- BG-TUSNET
- Registrant
- Technical University of Sofia
- Registrant country
- BG
- Organization
- Technical University of Sofia (ORG-TUOS2-RIPE)
- Org country
- BG
- Type
- ASSIGNED PI
- Created
- Apr 17, 2003
- Updated
- Dec 23, 2025
- Maintainer
- RIPE-NCC-END-MNT
- RIR
- RIPE NCC
- Country
- BG
- Delegated
- Apr 17, 2003
- Status
- assigned
Report abuse
Abuse contact
- abuse@
tu-sofia. bg - Name
- Abuse-C Role
- Handle
- AR19085-RIPE