1. All IP Ranges
  2. 81.0.0.0/8
  3. 81.161.0.0/16
  4. AS28949  | 81.161.240.0/20

81.161.240.0/20

AS28949  ·  Technical University of Sofia

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Summary

Country Bulgaria
Domain tu-sofia.bg
ASN AS28949
Registry RIPE
ID BG-TUSNET

WHOIS Details

inetnum:        81.161.240.0 - 81.161.255.255
netname:        BG-TUSNET
descr:          8, Kliment Ohridski St.
descr:          Sofia 1000, Bulgaria
country:        BG
sponsoring-org: ORG-MN1-RIPE
admin-c:        SP9887-RIPE
tech-c:         LP9887-RIPE
status:         ASSIGNED PI
org:            ORG-TUOS2-RIPE
mnt-by:         RIPE-NCC-END-MNT
mnt-by:         TUSOFIA-MNT
mnt-routes:     TUSOFIA-MNT
notify:         admin@tu-sofia.bg
created:        2003-04-17T14:04:56Z
last-modified:  2025-12-23T06:42:18Z
source:         RIPE
abuse-email:    abuse@tu-sofia.bg
abuse-c:        AR19085-RIPE
abuse-org:      ORG-MN1-RIPE

organisation:   ORG-TUOS2-RIPE
org-name:       Technical University of Sofia
country:        BG
org-type:       OTHER
address:        8, Kliment Ohridski Bul.
address:        1000 Sofia
address:        Bulgaria
admin-c:        SP9887-RIPE
tech-c:         LP9887-RIPE
e-mail:         stefka@tu-sofia.bg
abuse-c:        AR19085-RIPE
e-mail:         lup@tu-sofia.bg
e-mail:         admin@tu-sofia.bg
mnt-ref:        TUSOFIA-MNT
mnt-by:         TUSOFIA-MNT
created:        2013-02-19T08:28:11Z
last-modified:  2022-12-01T16:56:36Z
source:         RIPE
abuse-email:    abuse@tu-sofia.bg
abuse-c:        AR19085-RIPE
abuse-org:      undefined

person:         Luben Popov
address:        Technical University of Sofia
address:        8, Kliment Ohridski St
address:        1000 Sofia
address:        Bulgaria
phone:          +359 2 9653981
nic-hdl:        LP9887-RIPE
mnt-by:         TUSOFIA-MNT
org:            ORG-TUOS2-RIPE
created:        2013-02-19T08:44:20Z
last-modified:  2013-02-19T08:44:20Z
source:         RIPE

person:         Stefka Popova
address:        Technical University of Sofia
address:        8, Kliment Ohridski St
address:        1000 Sofia
address:        Bulgaria
phone:          +359 2 9653041
fax-no:         +359 2 685446
mnt-by:         TUSOFIA-MNT
e-mail:         stefka@tu-sofia.bg
nic-hdl:        SP9887-RIPE
org:            ORG-TUOS2-RIPE
created:        2002-02-04T13:27:44Z
last-modified:  2013-02-19T08:39:35Z
source:         RIPE

route:          81.161.240.0/20
descr:          Technical University - Sofia
origin:         AS28949
mnt-by:         TUSOFIA-MNT
created:        2003-05-17T07:46:42Z
last-modified:  2003-05-17T07:46:42Z
source:         RIPE

Nearby Ranges

BGP prefixes that overlap with 81.161.0.0/16

Range ASN Company Num of IPs
81.161.128.0/18 AS15516 DKTV A/S 16,384
81.161.64.0/20 AS59479 GEMNET s.r.o. 4,096
81.161.208.0/20 AS9177 RTA Telecom Ltd. 4,096
81.161.192.0/20 AS58321 Oxylion Sp. z o.o. 4,096
81.161.88.0/21 AS204170 Awaser Oman LLC 2,048
81.161.80.0/21 AS204170 Awaser Oman LLC 2,048
81.161.108.0/22 AS199980 IVENDO sp. z o.o. 1,024
81.161.52.0/22 AS2856 Welt-Net Broadband 1,024
81.161.48.0/22 AS50835 Welt-Net Broadband 1,024
81.161.104.0/22 AS44124 Rybnet Sp. z o.o. Sp. k. 1,024
81.161.4.0/22 AS3561 SoHo Internet Solutions 1,024
81.161.12.0/22 AS9009 M247 Miami Customer 1,024
81.161.116.0/22 AS59516 Lanamar, Ltd. 1,024
81.161.102.0/23 AS208861 NETOWSKI sp. z o.o. 512
81.161.56.0/23 AS198288 Sitewalk Establishment 512
81.161.96.0/23 AS198944 TNI Partner A/S 512
81.161.112.0/23 AS199028 Uniwersytet Medyczny w Lublinie 512
81.161.98.0/23 AS51115 HLL LLC 512
81.161.60.0/23 AS59477 LIFEPC, s.r.o. 512
81.161.235.0/24 AS207146 STATIC BUSINESS CUSTOMER REGION MI 256
81.161.229.0/24 AS20860 WorldStream B.V. 256
81.161.10.0/24 AS136787 PacketHub United Kingdom 256
81.161.115.0/24 AS211763 JAF International Services GmbH 256
81.161.238.0/24 AS214668 axushost.com 256
81.161.239.0/24 AS215292 GravHosting 256
81.161.237.0/24 AS20454 Fuse_Hostingweb 256
81.161.228.0/24 AS203217 Horizon Scope Mobile Telecom WLL 256
81.161.236.0/24 AS197715 Serverbike LTD 256
81.161.226.0/24 AS43131 Kay Net Customer IPv4 Space 256
81.161.231.0/24 AS197625 BMF PORT BURGAS AD 256
81.161.59.0/24 AS44418 Bitdefender SRL 256
81.161.224.0/24 AS47492 Consider IT Limited 256
81.161.225.0/24 AS47492 Consider IT Limited 256
81.161.100.0/24 AS197177 InterWan Sp. z o.o. 256
81.161.8.0/24 AS136787 PacketHub United Kingdom 256
81.161.62.0/24 AS16509 The Mobility House Energy GmbH 256
81.161.202.0/24 AS58321 Oxylion Sp. z o.o. 256
81.161.11.0/24 AS136787 PacketHub United Kingdom 256
81.161.230.0/24 AS151612 HOSTPERL 256
81.161.9.0/24 AS136787 PacketHub United Kingdom 256
81.161.114.0/24 AS59603 Regional state independent organization The information and techonological center of Kamchatka 256
81.161.101.0/24 AS61154 IDHosting Sp. z o. o. 256
81.161.58.0/24 AS204818 HOSTEUR SAS 256
81.161.63.0/24 AS205907 JSC MSU-1 256

Hosted domains

There are 15 domain names hosted across 10 IP addresses on this ASN. Checkout our API to access full domain hosting information.

IP Address Domain Domains on this IP

Hosted domains API

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Pingable IPs

444 IPs in this range 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 0.60ms from Sofia, BG
81.161.240.201 AS28949 Technical University of Sofia 0.35ms from Sofia, BG
81.161.242.71 AS28949 Technical University of Sofia 0.59ms from Sofia, BG
81.161.241.46 AS28949 Technical University of Sofia 0.57ms from Sofia, BG
81.161.246.223 AS28949 Technical University of Sofia 0.60ms from Sofia, BG
81.161.253.1 AS28949 Technical University of Sofia 1.24ms from Sofia, BG
81.161.244.134 AS28949 Technical University of Sofia 0.55ms from Sofia, BG
81.161.247.175 AS28949 Technical University of Sofia 0.61ms from Sofia, BG
81.161.245.69 AS28949 Technical University of Sofia 0.59ms from Sofia, BG
81.161.249.222 AS28949 Technical University of Sofia 0.60ms from Sofia, BG
81.161.250.148 AS28949 Technical University of Sofia 0.66ms from Sofia, BG
81.161.248.122 AS28949 Technical University of Sofia 0.57ms from Sofia, BG
81.161.251.226 AS28949 Technical University of Sofia 0.63ms from Sofia, BG
81.161.254.16 AS28949 Technical University of Sofia 0.57ms from Sofia, BG
81.161.252.84 AS28949 Technical University of Sofia 0.56ms 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
66.0.3.228 AS7029 Windstream Communications LLC 5.96ms from Atlanta, US
181.46.181.164 AS27747 Telecentro S.A. 6.20ms from Buenos Aires, AR
160.176.149.212 AS36903 Office National des Postes et Telecommunications ONPT (Maroc Telecom) / IAM 5.33ms from Casablanca, MA
118.143.211.100 AS9304 HGC Global Communications Limited 0.68ms from Hong Kong, HK
115.99.153.180 AS17488 Hathway IP Over Cable Internet 1.56ms from Hyderabad, IN
62.213.41.196 AS29071 Sputnikovaya svyaz LLC 0.34ms from Krasnoyarsk, RU
97.190.60.100 AS6167 Verizon Business 11.30ms from Los Angeles, US
97.164.114.212 AS6167 Verizon Business 10.34ms from Miami, US
212.84.48.148 AS43942 Grifonline S.r.l. 14.70ms from Milan, IT
189.8.74.196 AS11419 TELEFÔNICA BRASIL S.A 1.79ms from Osasco, BR
88.93.67.244 AS2119 Telenor Norge AS 10.29ms from Oslo, NO
74.6.195.132 AS36647 Yahoo Holdings Inc. 3.98ms from Seattle, US
163.29.197.68 AS4782 Data Communication Business Group 10.36ms from Taipei, TW
78.97.28.244 AS12302 Vodafone Romania S.A. 12.96ms from Timisoara, RO
133.226.181.52 AS131958 Tama Cable Network Co.,Ltd. 1.98ms from Tokyo, JP
126.48.165.68 AS17676 SoftBank Corp. 9.96ms from Tokyo, JP
91.183.68.100 AS5432 Proximus NV 1.13ms from Brussels, BE
186.57.76.68 AS22927 Telefonica de Argentina 1.56ms from Buenos Aires, AR
73.246.229.4 AS7922 Comcast Cable Communications, LLC 7.74ms from Chicago, US
87.104.53.148 AS44869 FIBIA P/S 2.92ms from Copenhagen, DK
75.38.22.52 AS7018 AT&T Enterprises, LLC 18.75ms from Dallas, US
3.253.19.132 AS16509 Amazon.com, Inc. 0.48ms from Dublin, IE
174.48.140.100 AS7922 Comcast Cable Communications, LLC 8.61ms from Miami, US
20.217.84.116 AS8075 Microsoft Corporation 0.59ms from Modiin Ilit, IL
98.35.24.180 AS7922 Comcast Cable Communications, LLC 6.70ms from San Jose, US

Traceroute

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

$
traceroute -a -n -q1 -f4 81.161.249.187
traceroute to 81.161.249.187 (81.161.249.187): 64 hops max, 52 byte packets
Measurement taken from IPinfo ProbeNet in Sofia, BG
On

What are IP address ranges?

IP address ranges, or netblocks, are groups of related IP addresses. They are usually represented as a base IP address, followed by a slash, and then a netmask which represents how many IP addresses are contained within the netblock. This format is known as CIDR. You'll also sometimes see netblocks given as a start ip address, and an end ip address, or an ip address range.

Traffic works its way around the internet based on the routing table, which contains a list of networks and their associated netblocks.

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