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 [email protected] to report abuse,
remarks:        spam or security incidents.
mnt-by:         SN-LIR-MNT
mnt-by:         SURF-AUTO-MNT
mnt-by:         SURF-AUTO-MNT
mnt-irt:        irt-SURFcert
notify:         [email protected]
created:        1970-01-01T00:00:00Z
last-modified:  2025-10-02T17:29:18Z
source:         RIPE
abuse-email:    [email protected]
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:         [email protected]
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:         [email protected]
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
145.26.0.0/16	AS3917	Shell Information Technology International	65,536
145.95.0.0/16	AS1103	SURF B.V.	65,536
145.82.0.0/16	AS25019	Saudi Telecom Company JSC	65,536
145.243.0.0/16	AS200757	Axel Springer SE	65,536
145.32.0.0/16	AS34108	Gemeente Delft	65,536
145.220.0.0/16	AS1101	SURF B.V.	65,536
145.236.0.0/16	AS1902	Budapest	65,536
145.55.0.0/16	AS16509	A100 ROW Inc	65,536
145.244.0.0/16	AS210543	Steiermaerkische Krankenanstalten GesmbH	65,536
145.86.0.0/16	AS15830	Medisch Spectrum Twente	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
145.232.0.0/16	AS15675	Etat de Vaud, CCT	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
145.234.0.0/16	AS206567	Tamedia AG	65,536
145.0.0.0/16	AS1103	SURFnet bv	65,536
145.94.0.0/16	AS1128	Delft University of Technology Network	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
145.245.0.0/16	AS2047	Hoffmann - La Roche Ltd.	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
145.18.0.0/16	AS1124	Universiteit van Amsterdam	65,536
145.41.0.0/16	AS1103	SURF B.V.	65,536
145.110.0.0/16	AS1104	NIKHEF	65,536
145.44.0.0/16	AS1103	Christelijke Hogeschool Windesheim	65,536
145.53.0.0/16	AS1136	KPN B.V.	65,536
145.5.0.0/16	AS1103	Erasmus Universiteit Rotterdam	65,536
145.117.0.0/16	AS1103	Academic Medical Centre	65,536
145.51.0.0/16	AS1103	Hogeschool Rotterdam & Omstreken	65,536
145.228.0.0/16	AS33873	Arvato Systems GmbH	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	netwerkopenhogeschool.com	14
145.20.188.51	ojh.nl	10
145.20.188.61	open-u.nl	9
145.20.188.17	benjijslimmer.nl	8
145.20.124.47	oerwijs.nl	5
145.20.126.12	welteninstitute.eu	3
145.20.124.96	wespot-project.eu	2
145.20.124.197	ou.be	2
145.20.124.233	ludolearncraft.com	2
145.20.124.109	metabolaspel.nl	1
145.20.124.71	elkedagopendag.nl	1
145.20.124.88	blurredlives.eu	1
145.20.124.182	schakelzone.nl	1
145.20.124.92	ddguide.nl	1
145.20.124.178	emergo.cc	1
145.20.173.34	schakelzone.com	1
145.20.179.130	rekenkamersparkstadlimburg.nl	1
145.20.124.60	know-netwerk.nl	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
145.20.188.75	AS1103 SURF B.V.	`5.35ms` from Amsterdam, NL
145.20.128.12	AS1103 SURF B.V.	`5.51ms` from Amsterdam, NL
145.20.126.131	AS1103 SURF B.V.	`5.08ms` from Amsterdam, NL
145.20.124.220	AS1103 SURF B.V.	`5.02ms` from Amsterdam, NL
145.20.127.12	AS1103 SURF B.V.	`5.60ms` 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
40.76.30.0	AS8075 Microsoft Corporation	`0.45ms` from Ashburn, US
167.114.81.144	AS16276 OVH SAS	`0.10ms` from Beauharnois, CA
83.134.219.240	AS5432 Proximus NV	`2.43ms` from Brussels, BE
136.49.134.112	AS16591 Google Fiber Inc.	`5.27ms` from Dallas, US
91.7.162.176	AS3320 Deutsche Telekom AG	`3.39ms` from Duesseldorf, DE
68.60.133.160	AS7922 Comcast Cable Communications, LLC	`9.39ms` from Flint, US
36.78.60.112	AS7713 PT Telekomunikasi Indonesia	`6.57ms` from Jakarta, ID
209.232.135.0	AS7018 AT&T Enterprises, LLC	`4.05ms` from Los Angeles, US
46.193.143.64	AS52075 Wifirst S.A.S.	`13.21ms` from Paris, FR
114.64.234.224	AS23724 IDC, China Telecommunications Corporation	`2.97ms` from Tianjin, CN
17.33.201.240	AS714 Apple Inc.	`1.70ms` from Ashburn, US
68.39.1.208	AS7922 Comcast Cable Communications, LLC	`14.18ms` from Chicago, US
72.3.159.192	AS33070 Rackspace Hosting	`1.07ms` from Dallas, US
172.173.71.0	AS8075 Microsoft Corporation	`0.23ms` from Des Moines, US
93.214.239.80	AS3320 Deutsche Telekom AG	`3.03ms` from Duesseldorf, DE
188.172.227.144	AS42473 Anexia Cloud Solutions GmbH	`0.58ms` from Frankfurt am Main, DE
120.55.65.16	AS37963 Hangzhou Alibaba Advertising Co.,Ltd.	`4.57ms` from Hangzhou, CN
154.85.59.128	AS55967 Beijing Baidu Netcom Science and Technology Co., Ltd.	`0.91ms` from Hong Kong, HK
88.10.65.48	AS3352 TELEFONICA DE ESPANA S.A.U.	`7.67ms` from Madrid, ES
82.127.204.48	AS3215 Orange S.A.	`1.80ms` from Paris, FR
122.6.169.224	AS4134 CHINANET-BACKBONE	`6.05ms` from Qingdao, CN
129.111.45.176	AS26971 RoadRunner	`8.48ms` from San Antonio, US
18.136.133.224	AS16509 Amazon.com, Inc.	`0.11ms` from Singapore, SG
24.237.46.64	AS8047 GENERAL COMMUNICATION, INC.	`4.72ms` from Anchorage, US
41.236.135.144	AS8452 TE-AS	`6.86ms` from Cairo, EG

Traceroute

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

traceroute -a -n -q1 -f2 -m8 145.20.52.210

traceroute to 145.20.52.210 (145.20.52.210): 8 hops max, 52 byte packets

2 [AS30058] 50.7.7.22 0.133 ms

3 [] 80.249.208.34 0.676 ms

4 [AS1103] 145.145.181.11 1.356 ms

5 [AS1103] 145.145.1.137 1.128 ms

6 *

7 *

8 *

Measurement taken from

IPinfo ProbeNet in Amsterdam, NL

On November 28th 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.

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