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
81.161.250.4 AS28949 Technical University of Sofia 0.70ms from Sofia, BG
81.161.241.85 AS28949 Technical University of Sofia 0.66ms from Sofia, BG
81.161.246.164 AS28949 Technical University of Sofia 0.65ms from Sofia, BG
81.161.240.201 AS28949 Technical University of Sofia 0.43ms from Sofia, BG
81.161.251.189 AS28949 Technical University of Sofia 0.76ms from Sofia, BG
81.161.249.12 AS28949 Technical University of Sofia 0.71ms from Sofia, BG
81.161.248.68 AS28949 Technical University of Sofia 0.66ms from Sofia, BG
81.161.245.199 AS28949 Technical University of Sofia 0.67ms from Sofia, BG
81.161.252.84 AS28949 Technical University of Sofia 0.68ms from Sofia, BG
81.161.243.49 AS28949 Technical University of Sofia 0.70ms from Sofia, BG
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
81.161.253.61 AS28949 Technical University of Sofia 1.32ms from Sofia, BG
81.161.244.134 AS28949 Technical University of Sofia 0.67ms from Sofia, BG
81.161.247.175 AS28949 Technical University of Sofia 0.70ms 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
20.120.79.85 AS8075 Microsoft Corporation 0.35ms from Ashburn, US
68.180.46.5 AS23473 PAVLOV MEDIA INC 9.41ms from Atlanta, US
61.49.224.165 AS4808 China Unicom Beijing Province Network 3.00ms from Beijing, CN
202.3.96.133 AS9652 ECN Internet 0.40ms from Brisbane, AU
81.183.122.133 AS5483 Magyar Telekom Plc. 5.65ms from Budapest, HU
18.254.11.101 AS8987 Amazon Data Services Ireland Ltd 1.11ms from Columbus, US
217.94.166.197 AS3320 Deutsche Telekom AG 7.12ms from Frankfurt am Main, DE
101.255.189.69 AS38511 PT Remala Abadi 0.86ms from Jakarta, ID
69.108.129.133 AS7018 AT&T Enterprises, LLC 3.30ms from Los Angeles, US
188.126.57.213 AS49368 DomoLAN Ltd. 1.37ms from Moscow, RU
120.195.91.213 AS56046 China Mobile communications corporation 2.94ms from Nanjing, CN
91.105.160.53 AS21127 Joint Stock Company TransTeleCom 9.30ms from Novosibirsk, RU
77.127.157.53 AS12400 Partner Communications Ltd. 3.86ms from Tel Aviv, IL
133.242.37.37 AS7684 SAKURA Internet Inc. 16.60ms from Tokyo, JP
169.55.97.133 AS36351 IBM Cloud 0.52ms from Ashburn, US
93.233.148.85 AS3320 Deutsche Telekom AG 2.29ms from Berlin, DE
31.104.193.101 AS2856 British Telecommunications PLC 4.63ms from Erith, GB
193.208.135.213 AS1759 Telia Finland Oyj 13.86ms from Helsinki, FI
211.44.245.69 AS9318 SK Broadband Co Ltd 0.98ms from Incheon, KR
213.108.54.229 AS25133 LLC McLaut-Invest 3.03ms from Kyiv, UA
38.108.104.229 AS174 Cogent Communications, LLC 1.19ms from New York City, US
97.69.105.133 AS33363 Charter Communications, Inc 4.63ms from Orlando, US
179.209.157.69 AS28573 Claro NXT Telecomunicacoes Ltda 5.39ms from Osasco, BR
141.8.67.53 AS12709 Melita Limited 4.88ms from Qormi, MT
34.193.215.117 AS14618 Amazon.com, Inc. 0.22ms 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 -f4 81.161.242.127
traceroute to 81.161.242.127 (81.161.242.127): 64 hops max, 52 byte packets
6 *
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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