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 3 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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Upstreams

There is 1 peer for this ASN.

upstreams Name
AS8717 A1 Bulgaria EAD
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ASN API & Database

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
81.161.245.69 AS28949 Technical University of Sofia 0.64ms from Sofia, BG
81.161.251.189 AS28949 Technical University of Sofia 0.64ms from Sofia, BG
81.161.242.48 AS28949 Technical University of Sofia 0.61ms from Sofia, BG
81.161.244.134 AS28949 Technical University of Sofia 0.53ms from Sofia, BG
81.161.246.63 AS28949 Technical University of Sofia 0.57ms from Sofia, BG
81.161.249.37 AS28949 Technical University of Sofia 0.58ms from Sofia, BG
81.161.240.201 AS28949 Technical University of Sofia 0.35ms from Sofia, BG
81.161.250.150 AS28949 Technical University of Sofia 0.59ms from Sofia, BG
81.161.247.25 AS28949 Technical University of Sofia 0.59ms from Sofia, BG
81.161.248.122 AS28949 Technical University of Sofia 0.56ms from Sofia, BG
81.161.252.84 AS28949 Technical University of Sofia 0.58ms from Sofia, BG
81.161.241.46 AS28949 Technical University of Sofia 0.60ms from Sofia, BG
81.161.243.20 AS28949 Technical University of Sofia 0.60ms from Sofia, BG
81.161.253.127 AS28949 Technical University of Sofia 0.93ms from Sofia, BG
81.161.254.16 AS28949 Technical University of Sofia 0.53ms 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
114.116.133.101 AS23724 IDC, China Telecommunications Corporation 5.22ms from Beijing, CN
76.24.108.21 AS7922 Comcast Cable Communications, LLC 8.80ms from Boston, US
1.156.148.229 AS1221 Telstra Limited 4.00ms from Brisbane, AU
179.97.40.53 AS262740 VELOO NET LTDA 15.60ms from Fortaleza, BR
134.93.106.21 AS2857 Johannes Gutenberg-Universitaet Mainz 2.54ms from Frankfurt am Main, DE
84.138.190.197 AS3320 Deutsche Telekom AG 2.96ms from Frankfurt am Main, DE
103.137.184.165 AS135905 VIETNAM POSTS AND TELECOMMUNICATIONS GROUP 0.68ms from Hanoi, VN
88.255.126.5 AS9121 Turk Telekomunikasyon Anonim Sirketi 0.81ms from Istanbul, TR
23.219.119.133 AS16625 Akamai Technologies, Inc. 0.23ms from Jakarta, ID
41.78.5.5 AS37353 Seacom Western Cape (Pty) Ltd 0.59ms from Johannesburg, ZA
60.53.127.69 AS4788 TM TECHNOLOGY SERVICES SDN. BHD. 1.99ms from Kuala Lumpur, MY
81.177.135.21 AS8342 JSC RTComm.RU 0.81ms from Moscow, RU
180.136.145.53 AS4134 CHINANET-BACKBONE 2.16ms from Nanning, CN
89.27.106.117 AS16086 DNA Oyj 4.28ms from Oulu, FI
51.44.28.181 AS16509 Amazon.com, Inc. 0.14ms from Paris, FR
45.130.213.21 AS9002 RETN Limited 0.49ms from Riga, LV
181.79.99.165 AS52468 UFINET PANAMA S.A. 4.41ms from San Salvador, SV
184.67.118.85 AS6327 Shaw Communications 3.23ms from Seattle, US
112.162.210.165 AS4766 Korea Telecom 6.21ms from Seoul, KR
171.124.33.101 AS4837 CHINA UNICOM China169 Backbone 5.79ms from Taiyuan, CN
23.111.189.101 AS29802 HIVELOCITY, Inc. 0.70ms from Tampa, US
122.216.11.5 AS17506 ARTERIA Networks Corporation 0.76ms from Tokyo, JP
180.57.56.181 AS4713 NTT DOCOMO BUSINESS,Inc. 16.31ms from Tokyo, JP
174.81.175.149 AS20115 Charter Communications LLC 18.61ms from Atlanta, US
60.26.242.101 AS4837 CHINA UNICOM China169 Backbone 4.89ms from Beijing, CN

Traceroute

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

$
traceroute -a -n -q1 -f4 81.161.247.160
traceroute to 81.161.247.160 (81.161.247.160): 64 hops max, 52 byte packets
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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