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 2 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
81.161.248.186 ██████████ 3
81.161.241.234 █████████ 3
81.161.240.3 ██████████ 3
81.161.241.17 ██████████ 2
81.161.244.206 ██████████ 1
81.161.250.25 ██████████ 1
81.161.241.2 ██████████ 1
81.161.244.205 ██████████ 1
81.161.246.92 ██████████ 1
81.161.245.239 ████████ 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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ASN API & Database

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
81.161.245.199 AS28949 Technical University of Sofia 0.63ms from Sofia, BG
81.161.247.12 AS28949 Technical University of Sofia 0.60ms from Sofia, BG
81.161.252.90 AS28949 Technical University of Sofia 0.61ms from Sofia, BG
81.161.248.68 AS28949 Technical University of Sofia 0.56ms from Sofia, BG
81.161.243.49 AS28949 Technical University of Sofia 0.57ms from Sofia, BG
81.161.240.201 AS28949 Technical University of Sofia 0.33ms from Sofia, BG
81.161.244.31 AS28949 Technical University of Sofia 0.54ms from Sofia, BG
81.161.254.16 AS28949 Technical University of Sofia 0.52ms from Sofia, BG
81.161.250.148 AS28949 Technical University of Sofia 0.61ms from Sofia, BG
81.161.242.71 AS28949 Technical University of Sofia 0.58ms from Sofia, BG
81.161.241.46 AS28949 Technical University of Sofia 0.55ms from Sofia, BG
81.161.253.127 AS28949 Technical University of Sofia 0.88ms from Sofia, BG
81.161.249.187 AS28949 Technical University of Sofia 0.61ms from Sofia, BG
81.161.251.4 AS28949 Technical University of Sofia 0.64ms from Sofia, BG
81.161.246.164 AS28949 Technical University of Sofia 0.56ms 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
152.22.79.101 AS81 MCNC 5.67ms from Atlanta, US
223.204.118.229 AS45758 Triple T Broadband Public Company Limited 2.67ms from Bangkok, TH
44.231.88.101 AS16509 Amazon.com, Inc. 0.16ms from Boardman, US
81.183.161.149 AS5483 Magyar Telekom Plc. 6.68ms from Budapest, HU
212.219.65.133 AS786 Jisc Services Limited 2.15ms from Chester, GB
77.74.131.117 AS44769 Bosnet Aktiebolag 4.20ms from Goeteborg, SE
81.110.99.149 AS5089 Virgin Media Limited 5.73ms from London, GB
179.24.251.165 AS6057 Administracion Nacional de Telecomunicaciones 3.61ms from Montevideo, UY
218.131.119.181 AS17676 SoftBank Corp. 4.14ms from Osaka, JP
185.134.125.165 AS49409 IVER NORGE AS 0.23ms from Oslo, NO
115.131.171.117 AS7545 TPG Telecom Limited 1.23ms from Perth, AU
27.200.105.37 AS4837 CHINA UNICOM China169 Backbone 5.03ms from Qingdao, CN
130.162.132.245 AS31898 Oracle Corporation 0.19ms from Seoul, KR
60.196.42.181 AS3786 LG DACOM Corporation 1.92ms from Seoul, KR
123.151.99.101 AS58542 Tianjij,300000 4.49ms from Tianjin, CN
186.182.36.5 AS11664 Techtel LMDS Comunicaciones Interactivas S.A. 9.37ms from Buenos Aires, AR
41.232.229.117 AS8452 TE-AS 3.37ms from Cairo, EG
50.210.178.21 AS7922 Comcast Cable Communications, LLC 9.98ms from Detroit, US
89.202.33.5 AS15830 Equinix (EMEA) Acquisition Enterprises B.V. 0.74ms from Frankfurt am Main, DE
79.175.117.133 AS209043 IPRoyal Services FZE LLC 0.24ms from Frankfurt am Main, DE
88.68.185.133 AS3209 Vodafone GmbH 8.39ms from Hamburg, DE
195.85.44.5 AS199245 PricewaterhouseCoopers Societe cooperative 1.35ms from Luxembourg, LU
2.138.197.117 AS3352 TELEFONICA DE ESPANA S.A.U. 1.74ms from Madrid, ES
115.37.16.181 AS18126 Chubu Telecommunications Company, Inc. 4.25ms from Osaka, JP
81.255.206.37 AS3215 Orange S.A. 1.18ms from Paris, FR

Traceroute

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

$
traceroute -a -n -q1 -f4 81.161.254.137
traceroute to 81.161.254.137 (81.161.254.137): 64 hops max, 52 byte packets
6 *
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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