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 9 days ago on Dec 01, 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
81.161.240.3 ██████████ 3
81.161.248.186 ██████████ 3
81.161.241.17 ██████████ 2
81.161.244.205 ██████████ 1
81.161.241.2 ██████████ 1
81.161.250.25 ██████████ 1
81.161.246.92 ██████████ 1
81.161.251.235 ██████████ 1
81.161.244.206 ██████████ 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
81.161.248.122 AS28949 Technical University of Sofia 0.58ms from Sofia, BG
81.161.253.1 AS28949 Technical University of Sofia 1.21ms from Sofia, BG
81.161.250.148 AS28949 Technical University of Sofia 0.61ms from Sofia, BG
81.161.254.16 AS28949 Technical University of Sofia 0.49ms from Sofia, BG
81.161.244.31 AS28949 Technical University of Sofia 0.55ms from Sofia, BG
81.161.246.223 AS28949 Technical University of Sofia 0.58ms from Sofia, BG
81.161.247.160 AS28949 Technical University of Sofia 0.58ms from Sofia, BG
81.161.252.83 AS28949 Technical University of Sofia 0.58ms from Sofia, BG
81.161.240.201 AS28949 Technical University of Sofia 0.34ms from Sofia, BG
81.161.242.239 AS28949 Technical University of Sofia 0.53ms from Sofia, BG
81.161.243.49 AS28949 Technical University of Sofia 0.53ms from Sofia, BG
81.161.245.69 AS28949 Technical University of Sofia 0.58ms from Sofia, BG
81.161.241.109 AS28949 Technical University of Sofia 0.62ms from Sofia, BG
81.161.251.4 AS28949 Technical University of Sofia 0.64ms from Sofia, BG
81.161.249.28 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
71.207.197.229 AS7922 Comcast Cable Communications, LLC 8.32ms from Atlanta, US
44.227.253.5 AS16509 Amazon.com, Inc. 0.17ms from Boardman, US
105.72.49.133 AS36884 Wana Corporate 9.15ms from Casablanca, MA
101.69.70.229 AS4837 CHINA UNICOM China169 Backbone 7.91ms from Hangzhou, CN
69.130.122.133 AS4181 TDS TELECOM 12.25ms from Los Angeles, US
149.36.251.213 AS212087 JOTELULU S.L. 0.80ms from Madrid, ES
70.55.75.149 AS577 Bell Canada 2.97ms from Montreal, CA
190.14.196.229 AS27796 Galaxy Communications 0.50ms from Panama, PA
213.158.28.85 AS12389 PJSC Rostelecom 18.36ms from Saint Petersburg, RU
121.142.76.245 AS4766 Korea Telecom 1.32ms from Seoul, KR
4.197.232.101 AS8075 Microsoft Corporation 0.71ms from Sydney, AU
193.17.203.181 AS34045 MCX SERWIS Sp. z o.o. 0.58ms from Warsaw, PL
152.97.137.53 AS21766 BEN LOMAND RURAL TELEPHONE COOPERATIVE, INC. 8.96ms from Atlanta, US
121.75.197.181 AS9500 One New Zealand Group Limited 6.33ms from Auckland, NZ
125.80.172.37 AS4134 CHINANET-BACKBONE 1.84ms from Chongqing, CN
18.185.136.85 AS16509 Amazon.com, Inc. 0.48ms from Frankfurt am Main, DE
93.201.137.53 AS3320 Deutsche Telekom AG 7.13ms from Frankfurt am Main, DE
47.238.204.5 AS45102 Alibaba (US) Technology Co., Ltd. 0.54ms from Hong Kong, HK
72.26.99.117 AS7296 Dynascale Technologies, Inc. 0.71ms from Los Angeles, US
2.101.138.53 AS13285 TalkTalk Communications Limited 2.44ms from Manchester, GB
60.240.67.197 AS7545 TPG Telecom Limited 1.64ms from Melbourne, AU
78.134.16.181 AS35612 EOLO S.p.A. 3.67ms from Milan, IT
37.45.11.21 AS6697 Republican Unitary Telecommunication Enterprise Beltelecom 6.15ms from Minsk, BY
74.216.114.5 AS6461 Zayo Bandwidth 0.47ms from Montreal, CA
125.72.227.245 AS140061 Qinghai Telecom 5.58ms from Xining, CN

Traceroute

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

$
traceroute -a -n -q1 -f5 81.161.253.1
traceroute to 81.161.253.1 (81.161.253.1): 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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