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 4 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
81.161.241.234 ██████████ 10
81.161.241.17 ██████████ 2
81.161.240.3 ██████████ 2
81.161.246.92 ██████████ 1
81.161.241.2 ██████████ 1
81.161.245.239 ████████ 1
81.161.248.186 ██████████ 1
81.161.250.25 ██████████ 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
81.161.254.253 AS28949 Technical University of Sofia 0.70ms from Sofia, BG
81.161.242.94 AS28949 Technical University of Sofia 0.66ms from Sofia, BG
81.161.246.164 AS28949 Technical University of Sofia 0.65ms from Sofia, BG
81.161.249.12 AS28949 Technical University of Sofia 0.71ms from Sofia, BG
81.161.252.84 AS28949 Technical University of Sofia 0.68ms from Sofia, BG
81.161.253.127 AS28949 Technical University of Sofia 0.96ms from Sofia, BG
81.161.244.134 AS28949 Technical University of Sofia 0.67ms from Sofia, BG
81.161.241.85 AS28949 Technical University of Sofia 0.66ms from Sofia, BG
81.161.250.4 AS28949 Technical University of Sofia 0.70ms from Sofia, BG
81.161.243.49 AS28949 Technical University of Sofia 0.70ms from Sofia, BG
81.161.240.201 AS28949 Technical University of Sofia 0.43ms from Sofia, BG
81.161.245.199 AS28949 Technical University of Sofia 0.67ms from Sofia, BG
81.161.247.175 AS28949 Technical University of Sofia 0.70ms from Sofia, BG
81.161.248.68 AS28949 Technical University of Sofia 0.66ms from Sofia, BG
81.161.251.189 AS28949 Technical University of Sofia 0.76ms 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
111.33.137.213 AS38019 tianjin Mobile Communication Company Limited 4.11ms from Beijing, CN
168.107.212.37 AS31898 Oracle Corporation 1.26ms from Delhi, IN
117.156.160.101 AS9808 China Mobile Communications Group Co., Ltd. 5.91ms from Lanzhou, CN
87.8.65.229 AS3269 Telecom Italia S.p.A. 4.77ms from Milan, IT
64.229.36.165 AS577 Bell Canada 6.58ms from Montreal, CA
31.23.187.53 AS12389 PJSC Rostelecom 16.25ms from Moscow, RU
213.41.214.181 AS13193 Keyyo SA 2.42ms from Paris, FR
39.73.13.69 AS4837 CHINA UNICOM China169 Backbone 8.36ms from Qingdao, CN
52.172.84.21 AS8075 Microsoft Corporation 0.32ms from Saint Thomas Mount, IN
175.200.113.21 AS4766 Korea Telecom 7.39ms from Seoul, KR
180.14.49.21 AS4713 NTT DOCOMO BUSINESS,Inc. 3.72ms from Tokyo, JP
91.227.61.5 AS58307 UNITEL-MEDIA Sp. z o.o. 2.01ms from Warsaw, PL
94.75.60.85 AS28812 PJSC Bashinformsvyaz 9.00ms from Yekaterinburg, RU
73.165.229.117 AS7922 Comcast Cable Communications, LLC 7.17ms from Ashburn, US
61.49.224.165 AS4808 China Unicom Beijing Province Network 3.00ms from Beijing, CN
120.4.159.181 AS4837 CHINA UNICOM China169 Backbone 7.26ms from Beijing, CN
93.233.148.85 AS3320 Deutsche Telekom AG 2.29ms from Berlin, DE
96.69.172.197 AS7922 Comcast Cable Communications, LLC 5.17ms from Denver, US
84.19.186.5 AS31103 Keyweb AG 0.16ms from Erfurt, DE
107.149.203.5 AS36137 PEG TECH INC 0.62ms from Frankfurt am Main, DE
103.106.190.245 AS401701 cognetcloud INC 0.58ms from Hong Kong, HK
78.134.16.181 AS35612 EOLO S.p.A. 3.94ms from Milan, IT
52.183.158.181 AS8075 Microsoft Corporation 0.88ms from Mumbai, IN
36.156.60.197 AS56046 China Mobile communications corporation 3.08ms from Nanjing, CN
3.235.220.21 AS14618 Amazon.com, Inc. 0.25ms 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 -f5 81.161.253.127
traceroute to 81.161.253.127 (81.161.253.127): 64 hops max, 52 byte packets
7 *
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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