Autonomous System details

AS28949

Technical University of Sofia  ·  tu-sofia.bg

Bulgaria

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AS28949 – Technical University of Sofia

Field Value
Country Bulgaria
Website tu-sofia.bg
Hosted domains 20
IPv4 addresses 4,096
IPv6 addresses 0
ASN type Education
Registry ripe
Allocated 23 years ago on Apr 16, 2003
Updated 4 months ago on Dec 23, 2025

IP Ranges

Netblock Company Num of IPs
81.161.240.0/20 8, Kliment Ohridski St. 4,096
81.161.240.0/24 8, Kliment Ohridski St. 256
81.161.241.0/24 8, Kliment Ohridski St. 256
81.161.242.0/24 8, Kliment Ohridski St. 256
81.161.243.0/24 8, Kliment Ohridski St. 256
81.161.244.0/24 8, Kliment Ohridski St. 256
81.161.245.0/24 8, Kliment Ohridski St. 256
81.161.246.0/24 8, Kliment Ohridski St. 256
81.161.247.0/24 8, Kliment Ohridski St. 256
81.161.248.0/24 8, Kliment Ohridski St. 256
81.161.249.0/24 8, Kliment Ohridski St. 256
81.161.250.0/24 8, Kliment Ohridski St. 256
81.161.251.0/24 8, Kliment Ohridski St. 256
81.161.252.0/24 8, Kliment Ohridski St. 256
81.161.253.0/24 8, Kliment Ohridski St. 256
81.161.254.0/24 8, Kliment Ohridski St. 256
81.161.255.0/24 8, Kliment Ohridski St. 256

There are no known IPv6 addresses belonging to this network

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WHOIS Details

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                                                ASHandle:       AS28949
                                                OrgID:          AS28949
                                                ASName:         AS28949
                                                ASNumber:       AS28949
                                                RegDate:        0000-00-00
                                                Updated:        0000-00-00
                                                TechHandle:     AA00-AAAA
                                                Source:         AAAA
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Hosted Domains

There are 20 domain names hosted across 11 IP addresses on this ASN.

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IP Address Domain Domains on this IP
81.161.241.234 ██████████ 10
81.161.241.17 ██████████ 2
81.161.240.3 ██████████ 2
81.161.246.92 ██████████ 1
81.161.241.2 ██████████ 1
81.161.245.239 ████████ 1
81.161.248.186 ██████████ 1
81.161.250.25 ██████████ 1

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Peers

There are 2 peers for this ASN.

Peers Name
AS6802 Bulgarian Research and Education Network Association (BREN)
AS8717 A1 Bulgaria EAD
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Upstreams

There are 2 upstreams for this ASN.

upstreams Name
AS6802 Bulgarian Research and Education Network Association (BREN)
AS8717 A1 Bulgaria EAD
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Downstreams

There are no downstreams for this ASN.

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ASN API & Database

Pingable IPs

15 IPs in this ASN replied to an ICMP ping during our most recent internet scan. Learn more.

IP Address ASN Details
81.161.253.1 AS28949 Technical University of Sofia 1.35ms from Sofia, BG
81.161.243.250 AS28949 Technical University of Sofia 0.70ms from Sofia, BG
81.161.244.31 AS28949 Technical University of Sofia 0.68ms from Sofia, BG
81.161.245.69 AS28949 Technical University of Sofia 0.67ms from Sofia, BG
81.161.251.189 AS28949 Technical University of Sofia 0.77ms from Sofia, BG
81.161.254.16 AS28949 Technical University of Sofia 0.65ms from Sofia, BG
81.161.246.164 AS28949 Technical University of Sofia 0.67ms from Sofia, BG
81.161.240.201 AS28949 Technical University of Sofia 0.46ms from Sofia, BG
81.161.250.150 AS28949 Technical University of Sofia 0.71ms from Sofia, BG
81.161.248.122 AS28949 Technical University of Sofia 0.70ms from Sofia, BG
81.161.247.137 AS28949 Technical University of Sofia 0.70ms from Sofia, BG
81.161.242.243 AS28949 Technical University of Sofia 0.69ms from Sofia, BG
81.161.249.187 AS28949 Technical University of Sofia 0.69ms from Sofia, BG
81.161.241.85 AS28949 Technical University of Sofia 0.65ms from Sofia, BG
81.161.252.57 AS28949 Technical University of Sofia 0.70ms from Sofia, BG

Other Pingable IPs

Below is a random selection of 25 IPs that replied to an ICMP ping during our most recent internet scan.

IP Address ASN Details
66.11.241.101 AS36545 Bledsoe Telephone Cooperative Corporation 4.30ms from Atlanta, US
54.200.203.117 AS16509 Amazon.com, Inc. 0.39ms from Boardman, US
54.189.128.213 AS16509 Amazon.com, Inc. 0.19ms from Boardman, US
98.223.67.101 AS7922 Comcast Cable Communications, LLC 5.40ms from Chicago, US
190.226.65.133 AS7303 Telecom Argentina S.A. 5.72ms from Cordoba, AR
115.238.45.21 AS4134 CHINANET BACKBONE 4.46ms from Hangzhou, CN
113.188.128.5 AS45899 VNPT Corp 2.46ms from Ho Chi Minh City, VN
39.60.177.53 AS17557 Pakistan Telecommunication Company Limited 15.76ms from Islamabad, PK
200.230.244.5 AS4230 CLARO S.A. 1.19ms from Sao Paulo, BR
175.241.203.5 AS4766 Korea Telecom 7.78ms from Seoul, KR
18.139.115.117 AS16509 Amazon.com, Inc. 0.14ms from Singapore, SG
216.212.221.85 AS40788 Start Communications 8.77ms from Toronto, CA
5.12.103.69 AS8708 DIGI ROMANIA S.A. 0.55ms from Bucharest, RO
169.59.11.5 AS36351 IBM Cloud 1.10ms from Dallas, US
14.181.23.21 AS45899 VNPT Corp 1.74ms from Hanoi, VN
203.171.29.21 AS45903 CMC Telecom Infrastructure Company 1.61ms from Ho Chi Minh City, VN
67.11.17.229 AS11427 Charter Communications Inc 8.54ms from Houston, US
216.18.197.213 AS18450 WebNX, Inc. 0.70ms from Los Angeles, US
188.126.57.213 AS49368 DomoLAN Ltd. 1.38ms from Moscow, RU
102.214.71.37 AS329272 Servercore Africa Ltd 0.21ms from Nairobi, KE
192.35.37.245 AS14531 Lockheed Martin Corporation 2.97ms from New York City, US
81.252.114.197 AS3215 Orange S.A. 2.88ms from Paris, FR
189.242.177.101 AS8151 UNINET 5.38ms from Santiago de Queretaro, MX
222.222.187.133 AS4134 CHINANET BACKBONE 3.33ms from Shijiazhuang, CN
89.120.48.117 AS9050 Orange Romania S.A. 0.83ms from Timisoara, RO

Traceroute

Below is a recent traceroute taken from the IPinfo ProbeNet to an IP in this ASN. Learn more.

$
traceroute -a -n -q1 -f4 81.161.252.1
traceroute to 81.161.252.1 (81.161.252.1): 64 hops max, 52 byte packets
8 [AS28949] 81.161.252.1 1.051 ms
Measurement taken from IPinfo ProbeNet in Sofia, BG
On

Related Networks

What is an ASN?

Autonomous System Numbers (ASNs) are assigned to entities such as Internet Service Providers and other large organizations that control blocks of IP addresses. This network page, and the organization field that's shown on the main IP address information page and also returned in the geolocation API are based on the ASN.

The ASN details will often correspond to the IP address owner, but for smaller organizations it may be that organization's parent, or their ISP. Find out more about AS28949 at robtex.

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