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 15
IPv4 addresses 4,096
IPv6 addresses 0
ASN type Education
Registry ripe
Allocated 23 years ago on Apr 16, 2003
Updated 20 days 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 15 domain names hosted across 10 IP addresses on this ASN.

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IP Address Domain Domains on this IP
81.161.248.186 ██████████ 3
81.161.240.3 ██████████ 3
81.161.241.17 ██████████ 2
81.161.251.235 ██████████ 1
81.161.244.205 ██████████ 1
81.161.250.25 ██████████ 1
81.161.241.2 ██████████ 1
81.161.244.206 ██████████ 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
81.161.253.1 AS28949 Technical University of Sofia 1.27ms from Sofia, BG
81.161.251.209 AS28949 Technical University of Sofia 0.65ms from Sofia, BG
81.161.240.201 AS28949 Technical University of Sofia 0.32ms from Sofia, BG
81.161.254.23 AS28949 Technical University of Sofia 0.58ms from Sofia, BG
81.161.244.134 AS28949 Technical University of Sofia 0.52ms from Sofia, BG
81.161.243.49 AS28949 Technical University of Sofia 0.56ms from Sofia, BG
81.161.247.175 AS28949 Technical University of Sofia 0.61ms from Sofia, BG
81.161.250.4 AS28949 Technical University of Sofia 0.59ms from Sofia, BG
81.161.249.187 AS28949 Technical University of Sofia 0.65ms from Sofia, BG
81.161.252.84 AS28949 Technical University of Sofia 0.59ms from Sofia, BG
81.161.241.15 AS28949 Technical University of Sofia 0.61ms from Sofia, BG
81.161.242.239 AS28949 Technical University of Sofia 0.57ms from Sofia, BG
81.161.248.25 AS28949 Technical University of Sofia 0.56ms from Sofia, BG
81.161.246.164 AS28949 Technical University of Sofia 0.56ms from Sofia, BG
81.161.245.199 AS28949 Technical University of Sofia 0.62ms 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
154.254.201.85 AS36947 Telecom Algeria 9.74ms from Algiers, DZ
92.46.40.181 AS9198 JSC Kazakhtelecom 0.46ms from Almaty, KZ
34.224.52.229 AS14618 Amazon.com, Inc. 0.56ms from Ashburn, US
17.33.92.37 AS714 Apple Inc. 0.30ms from Ashburn, US
71.237.17.229 AS7922 Comcast Cable Communications, LLC 3.19ms from Denver, US
23.213.171.37 AS16625 Akamai Technologies, Inc. 0.20ms from Frankfurt am Main, DE
131.207.69.37 AS375 Tietoevry Oyj 6.43ms from Helsinki, FI
165.140.169.5 AS400090 LMK Resources Inc. 0.26ms from Houston, US
114.9.25.101 AS4761 INDOSAT Internet Network Provider 1.04ms from Jakarta, ID
31.117.224.197 AS2856 British Telecommunications PLC 5.73ms from London, GB
97.202.198.37 AS6167 Verizon Business 16.75ms from Los Angeles, US
84.123.124.133 AS6739 VODAFONE ONO, S.A. 5.52ms from Madrid, ES
2.101.138.53 AS13285 TalkTalk Communications Limited 2.47ms from Manchester, GB
174.27.15.53 AS209 CenturyLink Communications, LLC 14.50ms from Portland, US
123.235.157.229 AS4837 CHINA UNICOM China169 Backbone 1.21ms from Qingdao, CN
123.132.119.165 AS4837 CHINA UNICOM China169 Backbone 7.76ms from Qingdao, CN
213.158.28.85 AS12389 PJSC Rostelecom 17.24ms from Saint Petersburg, RU
88.201.239.21 AS35807 SkyNet Ltd. 0.65ms from Saint Petersburg, RU
222.142.120.165 AS4837 CHINA UNICOM China169 Backbone 6.50ms from Zhengzhou, CN
77.175.17.165 AS1136 KPN B.V. 1.30ms from Amsterdam, NL
62.85.160.37 AS15404 COLT Technology Services Group Limited 3.95ms from Arezzo, IT
20.120.79.85 AS8075 Microsoft Corporation 0.37ms from Ashburn, US
111.33.137.213 AS38019 tianjin Mobile Communication Company Limited 4.10ms from Beijing, CN
204.131.84.165 AS209 CenturyLink Communications, LLC 9.35ms from Chicago, US
14.233.109.133 AS45899 VNPT Corp 8.73ms from Da Nang, VN

Traceroute

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

$
traceroute -a -n -q1 -f5 81.161.245.65
traceroute to 81.161.245.65 (81.161.245.65): 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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