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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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
81.161.244.31 AS28949 Technical University of Sofia 0.54ms 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
81.161.254.16 AS28949 Technical University of Sofia 0.52ms from Sofia, BG
81.161.240.201 AS28949 Technical University of Sofia 0.33ms from Sofia, BG
81.161.252.90 AS28949 Technical University of Sofia 0.61ms from Sofia, BG
81.161.241.46 AS28949 Technical University of Sofia 0.55ms from Sofia, BG
81.161.250.148 AS28949 Technical University of Sofia 0.61ms from Sofia, BG
81.161.246.164 AS28949 Technical University of Sofia 0.56ms from Sofia, BG
81.161.247.12 AS28949 Technical University of Sofia 0.60ms from Sofia, BG
81.161.245.199 AS28949 Technical University of Sofia 0.63ms from Sofia, BG
81.161.242.71 AS28949 Technical University of Sofia 0.58ms from Sofia, BG
81.161.253.127 AS28949 Technical University of Sofia 0.88ms 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

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
74.112.175.133 AS15085 Immedion, LLC 0.27ms from Asheville, US
94.224.119.117 AS6848 Telenet BV 5.12ms from Brussels, BE
184.71.227.37 AS6327 Shaw Communications 1.02ms from Calgary, CA
67.197.253.117 AS14615 Comporium, Inc 1.63ms from Charlotte, US
198.185.140.181 AS7016 Comcast Cable Communications, LLC 15.45ms from Detroit, US
212.37.55.245 AS12355 HeLi NET Telekommunikation GmbH & Co. 2.52ms from Duesseldorf, DE
122.50.7.5 AS131111 PT Mora Telematika Indonesia 1.76ms from Jakarta, ID
84.236.180.229 AS60807 Durcatel CB 6.68ms from Madrid, ES
124.135.143.197 AS4837 CHINA UNICOM China169 Backbone 7.63ms from Qingdao, CN
221.215.210.213 AS4837 CHINA UNICOM China169 Backbone 0.54ms from Qingdao, CN
82.24.56.37 AS11404 Wave Broadband 4.12ms from San Jose, US
200.98.207.229 AS7162 Universo Online S.A. 1.71ms from Sao Paulo, BR
35.244.100.5 AS396982 Google LLC 0.11ms from Sydney, AU
102.159.205.213 AS37705 TOPNET 2.13ms from Tunis, TN
52.148.212.117 AS8075 Microsoft Corporation 0.22ms from Amsterdam, NL
43.209.201.181 AS16509 Amazon.com, Inc. 1.58ms from Bangkok, TH
216.16.202.5 AS11430 Austin Bestline 5.72ms from Dallas, US
24.253.215.117 AS22773 Cox Communications Inc. 8.34ms from Dallas, US
213.109.189.133 AS209372 WS Telecom Inc 0.11ms from Denver, US
95.93.228.213 AS2860 NOS COMUNICACOES, S.A. 8.86ms from Lisbon, PT
80.31.0.53 AS3352 TELEFONICA DE ESPANA S.A.U. 10.91ms from Madrid, ES
34.111.191.213 AS396982 Google LLC 0.08ms from Melbourne, AU
66.67.124.37 AS11351 Charter Communications Inc 11.43ms from New York City, US
180.198.249.197 AS18126 Chubu Telecommunications Company, Inc. 8.39ms from Osaka, JP
107.191.76.5 AS14618 Amazon.com, Inc. 0.64ms from Reston, US

Traceroute

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

$
traceroute -a -n -q1 -f3 -m12 81.161.255.248
traceroute to 81.161.255.248 (81.161.255.248): 12 hops max, 52 byte packets
3 [AS9002] 87.245.233.72 35.979 ms
4 *
5 [AS8717] 213.222.40.225 36.317 ms
6 [AS8717] 213.222.40.226 36.158 ms
10 *
11 *
12 *
Measurement taken from IPinfo ProbeNet in Riga, LV
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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