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
81.161.248.186 ██████████ 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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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
81.161.252.40 AS28949 Technical University of Sofia 0.66ms from Sofia, BG
81.161.245.199 AS28949 Technical University of Sofia 0.61ms from Sofia, BG
81.161.254.16 AS28949 Technical University of Sofia 0.62ms from Sofia, BG
81.161.249.31 AS28949 Technical University of Sofia 0.69ms from Sofia, BG
81.161.241.46 AS28949 Technical University of Sofia 0.54ms from Sofia, BG
81.161.248.122 AS28949 Technical University of Sofia 0.62ms from Sofia, BG
81.161.250.148 AS28949 Technical University of Sofia 0.63ms from Sofia, BG
81.161.251.4 AS28949 Technical University of Sofia 0.70ms from Sofia, BG
81.161.243.49 AS28949 Technical University of Sofia 0.58ms from Sofia, BG
81.161.244.134 AS28949 Technical University of Sofia 0.56ms from Sofia, BG
81.161.247.25 AS28949 Technical University of Sofia 0.65ms from Sofia, BG
81.161.253.61 AS28949 Technical University of Sofia 0.79ms from Sofia, BG
81.161.242.71 AS28949 Technical University of Sofia 0.59ms from Sofia, BG
81.161.240.201 AS28949 Technical University of Sofia 0.35ms from Sofia, BG
81.161.246.223 AS28949 Technical University of Sofia 0.63ms 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
41.46.228.69 AS8452 TE-AS 3.43ms from Cairo, EG
24.152.16.197 AS270495 JRD TELECOM LTDA 8.79ms from Curitiba, BR
152.193.209.165 AS701 Verizon Business 0.47ms from Dallas, US
179.97.40.53 AS262740 VELOO NET LTDA 15.58ms from Fortaleza, BR
119.209.207.229 AS4766 Korea Telecom 2.36ms from Incheon, KR
111.14.40.229 AS24444 Shandong Mobile Communication Company Limited 3.05ms from Jinan, CN
194.180.10.5 AS196645 HOSTPRO LAB LLC 0.26ms from Kyiv, UA
59.45.133.37 AS4134 CHINANET-BACKBONE 3.29ms from Liaoyang, CN
85.61.148.5 AS12479 Orange Espagne SA 9.84ms from Madrid, ES
82.159.183.165 AS6739 Vodafone ONO AS 10.59ms from Madrid, ES
58.220.205.21 AS4134 CHINANET-BACKBONE 4.82ms from Nanjing, CN
38.108.104.229 AS174 Cogent Communications, LLC 1.20ms from New York City, US
45.228.86.5 AS267067 INTERNET SERVICE LTDA 13.80ms from Osasco, BR
187.86.208.213 AS53070 T-Systems do Brasil Ltda. 2.55ms from Osasco, BR
80.14.94.101 AS3215 Orange S.A. 3.50ms from Paris, FR
27.193.61.53 AS4837 CHINA UNICOM China169 Backbone 1.22ms from Qingdao, CN
79.52.3.245 AS3269 Telecom Italia S.p.A. 5.14ms from Rome, IT
77.127.157.53 AS12400 Partner Communications Ltd. 3.73ms from Rosh Ha‘Ayin, IL
88.87.9.5 AS8866 Vivacom Bulgaria EAD 4.80ms from Sofia, BG
82.80.56.21 AS8551 Bezeq International Ltd. 3.73ms from Tel Aviv, IL
113.231.57.133 AS4837 CHINA UNICOM China169 Backbone 3.61ms from Tieling, CN
20.116.48.165 AS8075 Microsoft Corporation 0.17ms from Toronto, CA
81.28.154.21 AS397766 Fairleigh Dickinson University 0.38ms from Vancouver, CA
216.204.120.229 AS7029 Windstream Communications LLC 0.54ms from Atlanta, US
152.22.79.101 AS81 MCNC 5.68ms from Atlanta, US

Traceroute

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

$
traceroute -a -n -q1 -f4 81.161.249.0
traceroute to 81.161.249.0 (81.161.249.0): 64 hops max, 52 byte packets
6 *
8 [AS28949] 81.161.249.0 1.514 ms
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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