Autonomous System details

AS28949

Technical University of Sofia  ·  tu-sofia.bg

Bulgaria

Need more data or want to access it via API or data downloads? Sign up to get free access

Sign up for free ›

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 12 days 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

Get this data and more with IPinfo's powerful IP Ranges API - quickly and easily identify company-owned IP ranges.
IP Ranges API

WHOIS Details

Join for free to view WHOIS details › 

                                                ASHandle:       AS28949
                                                OrgID:          AS28949
                                                ASName:         AS28949
                                                ASNumber:       AS28949
                                                RegDate:        0000-00-00
                                                Updated:        0000-00-00
                                                TechHandle:     AA00-AAAA
                                                Source:         AAAA
Get this data and more with IPinfo's WHOIS product - effortless access to POCs, ORGs, and Networks, for actionable intelligence.
IP WHOIS API & Database

Hosted Domains

There are 15 domain names hosted across 10 IP addresses on this ASN.

Join for free to explore hosted domains ›
IP Address Domain Domains on this IP
81.161.248.186 ██████████ 3
81.161.240.3 ██████████ 3
81.161.241.17 ██████████ 2
81.161.244.205 ██████████ 1
81.161.245.239 ████████ 1
81.161.246.92 ██████████ 1
81.161.241.2 ██████████ 1
81.161.250.25 ██████████ 1
81.161.251.235 ██████████ 1
81.161.244.206 ██████████ 1

Discover all domains hosted on a single IP address with IPinfo's powerful Hosted Domains (Reverse IP) solution.
Useful for Cybersecurity
Hosted Domains API & Database

Peers

There are 2 peers for this ASN.

Peers Name
AS6802 Bulgarian Research and Education Network Association (BREN)
AS8717 A1 Bulgaria EAD
Get this data and more insights on related domains, allocation dates, registry names, IP counts with IPinfo's IP-to-ASN product.
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
Get this data and more insights on related domains, allocation dates, registry names, IP counts with IPinfo's IP-to-ASN product.
ASN API & Database

Downstreams

There are no downstreams for this ASN.

Get this data and more insights on related domains, allocation dates, registry names, IP counts with IPinfo's IP-to-ASN product.
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
81.161.251.209 AS28949 Technical University of Sofia 0.65ms from Sofia, BG
81.161.241.15 AS28949 Technical University of Sofia 0.61ms from Sofia, BG
81.161.248.25 AS28949 Technical University of Sofia 0.56ms from Sofia, BG
81.161.244.134 AS28949 Technical University of Sofia 0.52ms from Sofia, BG
81.161.250.4 AS28949 Technical University of Sofia 0.59ms from Sofia, BG
81.161.249.187 AS28949 Technical University of Sofia 0.65ms from Sofia, BG
81.161.243.49 AS28949 Technical University of Sofia 0.56ms from Sofia, BG
81.161.247.175 AS28949 Technical University of Sofia 0.61ms from Sofia, BG
81.161.242.239 AS28949 Technical University of Sofia 0.57ms from Sofia, BG
81.161.252.84 AS28949 Technical University of Sofia 0.59ms from Sofia, BG
81.161.246.164 AS28949 Technical University of Sofia 0.56ms from Sofia, BG
81.161.253.1 AS28949 Technical University of Sofia 1.27ms from Sofia, BG
81.161.240.201 AS28949 Technical University of Sofia 0.32ms from Sofia, BG
81.161.254.23 AS28949 Technical University of Sofia 0.58ms from Sofia, BG
81.161.245.199 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
77.175.17.165 AS1136 KPN B.V. 1.30ms from Amsterdam, NL
104.129.173.53 AS22024 Splunk, Inc. 1.12ms from Ashburn, US
74.112.175.133 AS15085 Immedion, LLC 0.30ms from Asheville, US
58.154.187.5 AS4538 China Education and Research Network Center 6.98ms from Dalian, CN
117.253.250.69 AS9829 National Internet Backbone 13.97ms from Delhi, IN
213.166.167.213 AS12552 GlobalConnect AB 2.82ms from Falkenberg, SE
14.164.195.101 AS45899 VNPT Corp 5.41ms from Ho Chi Minh City, VN
182.186.218.133 AS17557 Pakistan Telecommunication Company Limited 10.17ms from Islamabad, PK
167.82.234.21 AS54113 Fastly, Inc. 0.35ms from Manila, PH
78.134.16.181 AS35612 EOLO S.p.A. 4.36ms from Milan, IT
74.111.40.229 AS701 Verizon Business 12.89ms from New York City, US
80.14.94.101 AS3215 Orange S.A. 2.64ms from Paris, FR
184.28.102.85 AS24319 Akamai Technologies Tokyo ASN 0.72ms from Saint Thomas Mount, IN
186.177.26.245 AS262197 MILLICOM CABLE COSTA RICA S.A. 0.56ms from San Jose, CR
79.119.156.165 AS8708 DIGI ROMANIA S.A. 7.02ms from Timisoara, RO
89.106.234.5 AS9198 JSC Kazakhtelecom 0.25ms from Almaty, KZ
52.54.96.197 AS14618 Amazon.com, Inc. 0.55ms from Ashburn, US
115.99.238.117 AS17488 Hathway IP Over Cable Internet 1.07ms from Bengaluru, IN
156.196.71.21 AS8452 TE-AS 4.33ms from Cairo, EG
202.191.171.165 AS9583 Sify Limited 1.02ms from Chennai, IN
174.105.8.37 AS10796 Charter Communications Inc 16.91ms from Columbus, US
89.245.1.149 AS8881 1&1 Versatel GmbH 1.87ms from Duesseldorf, DE
178.29.171.181 AS8434 Telenor Sverige AB 15.26ms from Falkenberg, SE
210.184.214.181 AS9729 iAdvantage Limited 1.43ms from Hong Kong, HK
117.156.43.53 AS9808 China Mobile Communications Group Co., Ltd. 3.87ms from Lanzhou, 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 -m12 81.161.255.26
traceroute to 81.161.255.26 (81.161.255.26): 12 hops max, 52 byte packets
5 [AS8717] 213.222.40.225 192.931 ms
6 [AS8717] 213.222.40.226 194.346 ms
7 [AS28949] 81.161.240.202 193.832 ms
8 [AS28949] 81.161.240.201 192.992 ms
9 [AS28949] 81.161.240.202 192.878 ms
10 *
11 *
12 *
Measurement taken from IPinfo ProbeNet in Taos, US
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.

Data built with users in mind: reliable, accurate, and easy-to-use

Discover why industry-leading companies around the globe love our data. IPinfo's accurate insights fuel use cases from cybersecurity, data enrichment, web personalization, and much more.

Get Started for Free Contact Sales
IPinfo for all your IP geolocation needs

Our IP tools

Explore all tools
What is my IP

What is my IP

Test our data accuracy by viewing insights from your IP address.

See your IP address
Map IPs

Map IPs

Paste up to 500,000 IPs to see where they're located on a map.

Try Map IPs
Summarize IPs

Summarize IPs

Use our data visualization tool to create a visual overview of multiple IPs.

Try Summarize IPs