145.20.0.0/16

AS1103 · SURF B.V.

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Summary

Country	Netherlands
Domain	ou.nl
ASN	AS1103
Registry	RIPE
ID	OU-NET

WHOIS Details

inetnum:        145.20.0.0 - 145.20.255.255
netname:        OU-Net
descr:          Open Universiteit
country:        NL
admin-c:        OUCT1-RIPE
tech-c:         OUCT1-RIPE
status:         LEGACY
remarks:        Use cert@ou.nl to report abuse,
remarks:        spam or security incidents.
mnt-by:         SN-LIR-MNT
mnt-irt:        irt-SURFcert
notify:         lir@surfnet.nl
created:        1970-01-01T00:00:00Z
last-modified:  2019-12-04T13:10:51Z
source:         RIPE
abuse-email:    cert@surfcert.nl
abuse-c:        SNS1-RIPE
abuse-org:      ORG-Sb3-RIPE

role:           CERT OU
address:        Open Universiteit Nederland
address:        P.O. Box 2960
address:        6401 DL Heerlen
address:        The Netherlands
phone:          +31 45 5762627
e-mail:         cert@ou.nl
nic-hdl:        OUCT1-RIPE
mnt-by:         SN-LIR-MNT
created:        2014-04-23T11:54:15Z
last-modified:  2014-04-23T11:54:15Z
source:         RIPE

route:          145.20.0.0/16
descr:          OUH-NL
origin:         AS1103
notify:         lir@surfnet.nl
mnt-by:         AS1103-MNT
created:        2002-02-27T13:29:00Z
last-modified:  2019-03-21T09:01:44Z
source:         RIPE

Nearby Ranges

BGP prefixes that overlap with 145.0.0.0/8

Range	ASN	Company	Num of IPs
145.132.0.0/15	AS8075	Microsoft Limited	131,072
145.58.0.0/16	AS25182	Publieke Omroep Nederland	65,536
145.218.0.0/16	AS49362	DSV A/S	65,536
145.31.0.0/16	AS42894	Ministerie van Verkeer en Waterstaat/Rijkswaterstaat	65,536
145.247.0.0/16	AS41701	Porkkalankatu 3	65,536
145.50.0.0/16	AS42894	Ministerie van Verkeer en Waterstaat/Rijkswaterstaat	65,536
145.13.0.0/16	AS21286	F&IT RIM - OsirisNG, Zoetermeer	65,536
145.82.0.0/16	AS25019	Saudi Telecom Company JSC	65,536
145.245.0.0/16	AS2047	Hoffmann - La Roche Ltd.	65,536
145.244.0.0/16	AS210543	Steiermaerkische Krankenanstalten GesmbH	65,536
145.222.0.0/16	AS21286	KPN B.V.	65,536
145.238.0.0/16	AS2200	Observatoire de Paris	65,536
145.232.0.0/16	AS15675	Etat de Vaud, CCT	65,536
145.236.0.0/16	AS1902	Budapest	65,536
145.55.0.0/16	AS16509	A100 ROW Inc	65,536
145.234.0.0/16	AS206567	Tamedia AG	65,536
145.243.0.0/16	AS200757	Axel Springer SE	65,536
145.126.0.0/16	AS1103	SURFnet bv	65,536
145.108.0.0/16	AS1103	Vrije Universiteit Amsterdam	65,536
145.239.0.0/16	AS16276	OVH SAS	65,536
145.220.0.0/16	AS1101	SURF B.V.	65,536
145.230.0.0/16	AS12663	Vodafone Group Services GmbH	65,536
145.17.0.0/16	AS16509	A100 ROW Inc	65,536
145.243.0.0/16	AS16509	Axel Springer SE	65,536
145.221.0.0/16	AS15625	ING Bank NV	65,536
145.4.0.0/16	AS1136	PGGM N.V.	65,536
145.68.0.0/16	AS1136	ISC-NL	65,536
145.53.0.0/16	AS1136	KPN B.V.	65,536
145.0.0.0/16	AS1103	SURFnet bv	65,536
145.86.0.0/16	AS15830	Medisch Spectrum Twente	65,536
145.52.0.0/16	AS1103	Haagse Hogeschool	65,536
145.76.0.0/16	AS1103	Hogeschool Saxion	65,536
145.81.0.0/16	AS1103	SURFnet bv	65,536
145.85.0.0/16	AS1103	Fontys Hogescholen	65,536
145.9.0.0/16	AS1103	Deltares	65,536
145.91.0.0/16	AS1103	Hogeschool Zuyd	65,536
145.95.0.0/16	AS1103	SURF B.V.	65,536
145.19.0.0/16	AS1103	Hogeschool Zeeland Network	65,536
145.7.0.0/16	AS1136	KPN B.V.	65,536
145.23.0.0/16	AS1103	Koninklijk Nederlands Meteorologisch Instituut	65,536
145.251.0.0/16	AS12552	Systembolaget AB	65,536
145.24.0.0/16	AS1103	Hogeschool Rotterdam & Omstreken	65,536
145.119.0.0/16	AS1136	ISC-NL	65,536
145.33.0.0/16	AS1103	Hanzehogeschool Groningen	65,536
145.103.0.0/16	AS1103	Stichting GlasLokaal	65,536
145.37.0.0/16	AS1103	Hanzehogeschool Groningen	65,536
145.94.0.0/16	AS1128	Delft University of Technology Network	65,536
145.110.0.0/16	AS1104	NIKHEF	65,536
145.41.0.0/16	AS1103	SURF B.V.	65,536

Hosted domains

There are 107 domain names hosted across 28 IP addresses on this ASN. Checkout our API to access full domain hosting information.

IP Address	Domain	Domains on this IP
145.20.124.148	ou.nl	53
145.20.124.103	noh-b.nl	14
145.20.188.51	welten-instituut.nl	10
145.20.188.61	openu.org	9
145.20.188.17	metabolagame.com	8
145.20.124.47	openu.nl	5
145.20.126.12	welteninstitute.eu	3
145.20.124.96	wespot-project.eu	2
145.20.124.233	ludolearncraft.nl	2
145.20.124.197	openuniversiteit.be	2
145.20.124.60	know-netwerk.nl	1
145.20.124.178	emergo.cc	1
145.20.132.54	iasl2015.org	1
145.20.124.228	eartest.nl	1
145.20.188.28	informatievaardig.nl	1
145.20.179.130	rekenkamersparkstadlimburg.nl	1
145.20.124.88	blurredlives.eu	1
145.20.124.91	emergo.cc	1
145.20.173.34	schakelzone.com	1
145.20.188.132	bamas.nl	1

Hosted domains API

Our Hosted Domains API, or Reverse IP API returns a full list of domains that are hosted on a single IP address.

Useful for Cybersecurity

Read more

Pingable IPs

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

IP Address	ASN	Details
145.20.128.12	AS1103 SURF B.V.	`5.04ms` from Amsterdam, NL
145.20.127.12	AS1103 SURF B.V.	`5.23ms` from Amsterdam, NL
145.20.188.75	AS1103 SURF B.V.	`5.06ms` from Amsterdam, NL
145.20.124.133	AS1103 SURF B.V.	`4.89ms` from Amsterdam, NL
145.20.126.133	AS1103 SURF B.V.	`5.07ms` from Amsterdam, NL

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
173.92.114.192	AS11426 Charter Communications Inc	`10.50ms` from Atlanta, US
89.165.161.176	AS48161 NEXTGEN COMMUNICATIONS SRL	`5.11ms` from Bucharest, RO
38.153.179.16	AS55286 B2 Net Solutions Inc.	`0.16ms` from Buffalo, US
70.122.103.176	AS11427 Charter Communications Inc	`6.15ms` from Dallas, US
216.61.198.16	AS7018 AT&T Enterprises, LLC	`1.00ms` from Dallas, US
71.7.218.160	AS11260 EastLink	`8.70ms` from Halifax, CA
116.103.38.64	AS24086 Viettel Corporation	`10.29ms` from Ho Chi Minh City, VN
121.203.234.208	AS17924 SmarTone Mobile Communications Ltd	`12.40ms` from Hong Kong, HK
182.176.232.16	AS17557 Pakistan Telecommunication Company Limited	`0.94ms` from Islamabad, PK
105.243.133.80	AS36994 Vodacom	`4.34ms` from Johannesburg, ZA
154.217.212.208	AS30781 Free Pro SAS	`0.55ms` from Marseille, FR
5.129.182.240	AS60119 Ediniy Operator Svyazi LLC	`4.80ms` from Novosibirsk, RU
122.1.121.192	AS4713 NTT DOCOMO BUSINESS,Inc.	`7.34ms` from Osaka, JP
52.46.67.16	AS16509 Amazon.com, Inc.	`0.07ms` from Paris, FR
189.154.198.0	AS8151 UNINET	`14.90ms` from Phoenix, US
24.11.89.192	AS7922 Comcast Cable Communications, LLC	`10.14ms` from Salt Lake City, US
172.185.241.48	AS8075 Microsoft Corporation	`0.60ms` from San Jose, US
111.119.223.208	AS136907 HUAWEI CLOUDS	`0.90ms` from Singapore, SG
61.220.113.32	AS3462 Data Communication Business Group	`1.45ms` from Taipei, TW
49.129.153.160	AS2518 BIGLOBE Inc.	`11.64ms` from Tokyo, JP
44.225.54.128	AS16509 Amazon.com, Inc.	`0.15ms` from Boardman, US
1.141.75.64	AS1221 Telstra Limited	`3.42ms` from Brisbane, AU
181.95.58.192	AS7303 Telecom Argentina S.A.	`10.03ms` from Buenos Aires, AR
213.114.113.16	AS8434 Telenor Sverige AB	`2.10ms` from Copenhagen, DK
41.136.71.128	AS23889 Mauritius Telecom Ltd	`1.76ms` from Ebene, MU

Traceroute

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

traceroute -a -n -q1 -f4 -m11 145.20.79.42

traceroute to 145.20.79.42 (145.20.79.42): 11 hops max, 52 byte packets

4 [AS37468] 102.130.70.203 1.54 ms

5 *

6 *

7 *

8 [AS1103] 145.145.1.137 135.143 ms

9 *

10 *

11 *

Measurement taken from

IPinfo ProbeNet in Luanda, AO

On October 30th 2025

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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