81.161.242.0/24

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 81.161.242.0/24

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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Useful for Cybersecurity

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Pingable IPs

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

IP Address	ASN	Details
81.161.242.239	AS28949 Technical University of Sofia	`0.57ms` 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
108.141.147.232	AS8075 Microsoft Corporation	`0.20ms` from Amsterdam, NL
167.121.50.40	AS10662 Norfolk Southern Corporation	`1.00ms` from Atlanta, US
197.36.222.88	AS8452 TE-AS	`3.61ms` from Cairo, EG
82.86.77.248	AS272809 THUNDERNET, C.A.	`7.64ms` from Caracas, VE
123.18.236.136	AS45899 VNPT Corp	`2.75ms` from Hanoi, VN
42.118.122.216	AS18403 FPT Telecom Company	`1.35ms` from Ho Chi Minh City, VN
223.98.219.8	AS24444 Shandong Mobile Communication Company Limited	`3.77ms` from Jinan, CN
18.170.104.136	AS16509 Amazon.com, Inc.	`0.16ms` from London, GB
86.145.56.136	AS2856 British Telecommunications PLC	`6.02ms` from London, GB
23.196.182.152	AS16625 Akamai Technologies, Inc.	`0.88ms` from New York City, US
114.66.38.40	AS136188 NINGBO, ZHEJIANG Province, P.R.China.	`0.25ms` from Ningbo, CN
91.168.199.120	AS12322 Free SAS	`4.51ms` from Paris, FR
179.106.153.120	AS52537 microplan informatica ltda.	`8.01ms` from Rio de Janeiro, BR
155.207.91.40	AS5470 AUTH-NET-AS	`10.17ms` from Athens, GR
210.246.80.72	AS138524 Triple T Broadband Public Company Limited	`4.14ms` from Bangkok, TH
97.177.31.8	AS6167 Verizon Business	`11.85ms` from Boston, US
72.198.47.56	AS22773 Cox Communications Inc.	`8.47ms` from Dallas, US
90.200.160.168	AS5607 Sky UK Limited	`5.02ms` from Erith, GB
34.104.26.24	AS396982 Google LLC	`8.72ms` from Frankfurt am Main, DE
216.249.80.168	AS11550 Smithville Digital, LLC	`6.67ms` from Indianapolis, US
197.149.161.136	AS37438 Gijima Holdings (PTY) Limited	`1.06ms` from Johannesburg, ZA
194.75.88.136	AS6871 Plusnet	`1.33ms` from London, GB
76.171.127.184	AS20001 Charter Communications Inc	`6.50ms` from Los Angeles, US
60.217.248.8	AS4837 CHINA UNICOM China169 Backbone	`5.68ms` from Qingdao, CN
44.12.14.248	AS395394 xyTel LLC	`6.79ms` from Seattle, 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 81.161.242.1

traceroute to 81.161.242.1 (81.161.242.1): 64 hops max, 52 byte packets

4 [AS8717] 213.222.40.233 0.577 ms

5 [AS8717] 213.222.40.234 0.383 ms

6 [AS28949] 81.161.240.202 0.608 ms

7 [AS28949] 81.161.240.198 0.723 ms

8 [AS28949] 81.161.242.1 1.655 ms

Measurement taken from

IPinfo ProbeNet in Sofia, BG

On December 28th 2025

What are IP address ranges?

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