1. All IP Ranges
  2. 81.0.0.0/8
  3. 81.161.0.0/16
  4. AS28949  | 81.161.253.0/24

81.161.253.0/24

AS28949  ·  Technical University of Sofia

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Summary

Country Bulgaria
Domain tu-sofia.bg
ASN AS28949
Parent Range 81.161.240.0/20
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

Overlapping Ranges

BGP prefixes that contain 81.161.253.0/24

Range ASN Company Num of IPs
81.161.240.0/20 AS28949 8, Kliment Ohridski St. 4,096

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
81.161.240.0/20 AS28949 8, Kliment Ohridski St. 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 no domains currently hosted on this ASN.

Hosted domains API

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Pingable IPs

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

IP Address ASN Details
81.161.253.127 AS28949 Technical University of Sofia 0.93ms 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
102.185.235.232 AS24835 Vodafone Data 18.00ms from Cairo, EG
74.135.231.104 AS10796 Charter Communications Inc 11.87ms from Chicago, US
71.29.186.88 AS7029 Windstream Communications LLC 13.35ms from Chicago, US
3.123.226.152 AS16509 Amazon.com, Inc. 0.17ms from Frankfurt am Main, DE
78.181.139.136 AS9121 Turk Telekomunikasyon Anonim Sirketi 18.21ms from Istanbul, TR
20.250.86.248 AS8075 Microsoft Corporation 0.19ms from Kloten, CH
90.60.191.88 AS3215 Orange S.A. 8.09ms from Marseille, FR
151.66.178.24 AS1267 WIND TRE S.P.A. 2.24ms from Milan, IT
153.196.201.24 AS4713 NTT DOCOMO BUSINESS,Inc. 9.22ms from Osaka, JP
177.159.168.120 AS18881 TELEFÔNICA BRASIL S.A 2.10ms from Osasco, BR
65.61.15.8 AS11357 InfoQuest Technologies, Inc. 10.95ms from Pittsburgh, US
194.108.89.8 AS13036 T-Mobile Czech Republic a.s. 0.57ms from Prague, CZ
82.48.51.88 AS3269 Telecom Italia S.p.A. 5.17ms from Rome, IT
188.63.137.136 AS3303 Swisscom (Switzerland) Ltd 2.35ms from Zuerich, CH
74.7.225.248 AS8075 Microsoft Corporation 0.92ms from Atlanta, US
78.29.223.104 AS6848 Telenet BV 1.68ms from Brussels, BE
129.128.82.120 AS3359 University of Alberta 5.30ms from Calgary, CA
47.153.95.104 AS5650 Frontier Communications of America, Inc. 3.86ms from Los Angeles, US
88.14.70.152 AS3352 TELEFONICA DE ESPANA S.A.U. 6.72ms from Madrid, ES
41.15.84.184 AS29975 Vodacom 12.38ms from Pretoria, ZA
177.159.207.136 AS18881 TELEFÔNICA BRASIL S.A 8.54ms from Rio de Janeiro, BR
209.29.85.136 AS852 TELUS Communications Inc. 15.44ms from Toronto, CA
192.109.240.248 AS41508 ZINET.NET.PL Sp. z.o.o. 1.81ms from Warsaw, PL
71.68.202.88 AS11426 Charter Communications Inc 8.73ms from Charlotte, US
93.193.82.56 AS3320 Deutsche Telekom AG 3.29ms from Frankfurt am Main, DE

Traceroute

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

$
traceroute -a -n -q1 -f4 81.161.253.127
traceroute to 81.161.253.127 (81.161.253.127): 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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