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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Pingable IPs

15 IPs in this ASN replied to an ICMP ping during our most recent internet scan. Learn more.

IP Address ASN Details
81.161.243.49 AS28949 Technical University of Sofia 0.70ms from Sofia, BG
81.161.245.199 AS28949 Technical University of Sofia 0.67ms from Sofia, BG
81.161.241.85 AS28949 Technical University of Sofia 0.66ms from Sofia, BG
81.161.253.61 AS28949 Technical University of Sofia 1.32ms from Sofia, BG
81.161.254.253 AS28949 Technical University of Sofia 0.70ms from Sofia, BG
81.161.249.12 AS28949 Technical University of Sofia 0.71ms from Sofia, BG
81.161.251.189 AS28949 Technical University of Sofia 0.76ms 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
81.161.250.4 AS28949 Technical University of Sofia 0.70ms from Sofia, BG
81.161.247.175 AS28949 Technical University of Sofia 0.70ms from Sofia, BG
81.161.252.84 AS28949 Technical University of Sofia 0.68ms from Sofia, BG
81.161.244.134 AS28949 Technical University of Sofia 0.67ms from Sofia, BG
81.161.240.201 AS28949 Technical University of Sofia 0.43ms from Sofia, BG
81.161.248.68 AS28949 Technical University of Sofia 0.66ms 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
120.4.159.181 AS4837 CHINA UNICOM China169 Backbone 7.26ms from Beijing, CN
202.3.96.133 AS9652 ECN Internet 0.40ms from Brisbane, AU
69.87.153.245 AS4208 The Iserv Company, LLC 5.65ms from Chicago, US
73.78.79.149 AS7922 Comcast Cable Communications, LLC 4.30ms from Denver, US
91.57.104.117 AS3320 Deutsche Telekom AG 8.82ms from Frankfurt am Main, DE
193.208.135.213 AS1759 Telia Finland Oyj 13.86ms from Helsinki, FI
97.95.51.21 AS20115 Charter Communications LLC 19.07ms from Minneapolis, US
31.23.187.53 AS12389 PJSC Rostelecom 16.25ms from Moscow, RU
91.105.160.53 AS21127 Joint Stock Company TransTeleCom 9.30ms from Novosibirsk, RU
39.89.18.213 AS4837 CHINA UNICOM China169 Backbone 1.65ms from Qingdao, CN
34.199.202.229 AS14618 Amazon.com, Inc. 0.18ms from Reston, US
95.167.191.21 AS12389 PJSC Rostelecom 0.94ms from Saint Petersburg, RU
175.200.113.21 AS4766 Korea Telecom 7.39ms from Seoul, KR
211.151.1.181 AS9308 Abitcool(China) Inc. 2.96ms from Tianjin, CN
82.77.199.21 AS8708 DIGI ROMANIA S.A. 6.47ms from Timisoara, RO
126.216.54.133 AS17676 SoftBank Corp. 3.38ms from Tokyo, JP
126.0.233.85 AS17676 SoftBank Corp. 5.16ms from Tokyo, JP
68.180.46.5 AS23473 PAVLOV MEDIA INC 9.41ms from Atlanta, US
187.124.246.117 AS47583 Hostinger International Limited 0.75ms from Boston, US
32.65.32.5 AS7018 AT&T Enterprises, LLC 1.01ms from Chicago, US
178.132.170.229 AS8926 Moldtelecom SA 0.71ms from Chisinau, MD
73.203.71.197 AS7922 Comcast Cable Communications, LLC 2.79ms from Denver, US
47.83.196.133 AS45102 Alibaba (US) Technology Co., Ltd. 0.50ms from Hong Kong, HK
165.140.169.5 AS400090 LMK Resources Inc. 0.27ms from Houston, US
85.154.90.5 AS28885 OmanTel NAP 2.09ms from Muscat, OM

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 81.161.255.208
traceroute to 81.161.255.208 (81.161.255.208): 12 hops max, 52 byte packets
3 [AS9002] 87.245.233.72 32.21 ms
4 [AS9002] 87.245.211.89 32.311 ms
5 [AS8717] 213.222.40.225 35.545 ms
6 [AS8717] 213.222.40.226 35.344 ms
10 *
11 *
12 *
Measurement taken from IPinfo ProbeNet in Copenhagen, DK
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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