145.51.0.0/16

AS1103 · SURF B.V.

Need more data or want to access it via API or data downloads? Sign up to get free access

Summary

Country	Netherlands
Domain	hro.nl
ASN	AS1103
Registry	RIPE
ID	HRONET

WHOIS Details

inetnum:        145.51.0.0 - 145.51.255.255
netname:        HRONET
descr:          Hogeschool Rotterdam & Omstreken
descr:          Museumpark 40
descr:          3015 CX Rotterdam
country:        NL
admin-c:        JS15878-RIPE
admin-c:        WP1617-RIPE
admin-c:        FV4808-RIPE
tech-c:         JS15878-RIPE
tech-c:         WP1617-RIPE
tech-c:         FV4808-RIPE
status:         LEGACY
mnt-by:         SN-LIR-MNT
mnt-by:         SURF-AUTO-MNT
mnt-by:         SURF-AUTO-MNT
mnt-irt:        irt-SURFcert
created:        1970-01-01T00:00:00Z
last-modified:  2025-10-02T17:29:24Z
source:         RIPE
abuse-email:    [email protected]
abuse-c:        SNS1-RIPE
abuse-org:      ORG-Sb3-RIPE

person:         Frans Verschoor
address:        Hogeschool Rotterdam
address:        Museumpark 40
address:        P.O. Box 25035
address:        3001 HA Rotterdam
address:        The Netherlands
phone:          +31 (0)10 7944237
fax-no:         +31 (0)10 7944360
nic-hdl:        FV4808-RIPE
mnt-by:         SN-LIR-MNT
created:        2014-03-24T17:12:33Z
last-modified:  2014-03-24T17:12:33Z
source:         RIPE

person:         Jeffry Sleddens
address:        Hogeschool Rotterdam
address:        Museumpark 40
address:        P.O. Box 25035
address:        3001 HA Rotterdam
address:        The Netherlands
phone:          +31 (0)10 2414415
fax-no:         +31 (0)10 2414360
e-mail:         [email protected]
nic-hdl:        JS15878-RIPE
notify:         [email protected]
notify:         [email protected]
created:        2002-01-05T16:54:48Z
last-modified:  2012-03-27T08:30:27Z
source:         RIPE
mnt-by:         HR-LIR-MNT

person:         Wouter Paalvast
address:        Hogeschool Rotterdam
address:        Museumpark 40
address:        P.O. Box 25035
address:        3001 HA Rotterdam
address:        The Netherlands
phone:          +31 (0)10 7941337
fax-no:         +31 (0)10 7944360
nic-hdl:        WP1617-RIPE
mnt-by:         SN-LIR-MNT
created:        2014-03-24T17:11:46Z
last-modified:  2014-03-24T17:11:46Z
source:         RIPE

route:          145.51.0.0/16
descr:          HESROTTERDAM
origin:         AS1103
notify:         [email protected]
mnt-by:         AS1103-MNT
created:        2002-02-27T13:45:03Z
last-modified:  2019-03-21T09:01:45Z
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
145.82.0.0/16	AS25019	Saudi Telecom Company JSC	65,536
145.95.0.0/16	AS1103	SURF B.V.	65,536
145.13.0.0/16	AS21286	F&IT RIM - OsirisNG, Zoetermeer	65,536
145.243.0.0/16	AS200757	Axel Springer SE	65,536
145.238.0.0/16	AS2200	Observatoire de Paris	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
145.20.0.0/16	AS1103	Open Universiteit	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
145.222.0.0/16	AS21286	KPN B.V.	65,536

Hosted domains

There are no domains currently hosted on this ASN.

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

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

IP Address	ASN	Details
145.51.114.9	AS1103 SURF B.V.	`2.79ms` from Amsterdam, NL
145.51.36.126	AS1103 SURF B.V.	`2.68ms` from Amsterdam, NL
145.51.112.251	AS1103 SURF B.V.	`2.57ms` from Amsterdam, NL
145.51.34.90	AS1103 SURF B.V.	`2.59ms` from Amsterdam, NL
145.51.54.94	AS1103 SURF B.V.	`2.63ms` from Amsterdam, NL
145.51.85.143	AS1103 SURF B.V.	`2.65ms` from Amsterdam, NL
145.51.81.254	AS1103 SURF B.V.	`2.79ms` from Amsterdam, NL
145.51.87.254	AS1103 SURF B.V.	`2.70ms` from Amsterdam, NL
145.51.38.212	AS1103 SURF B.V.	`2.76ms` from Amsterdam, NL
145.51.40.1	AS1103 SURF B.V.	`2.55ms` from Amsterdam, NL
145.51.119.126	AS1103 SURF B.V.	`2.63ms` from Amsterdam, NL
145.51.48.126	AS1103 SURF B.V.	`2.60ms` from Amsterdam, NL
145.51.124.126	AS1103 SURF B.V.	`2.73ms` from Amsterdam, NL
145.51.57.31	AS1103 SURF B.V.	`2.53ms` from Amsterdam, NL
145.51.51.11	AS1103 SURF B.V.	`2.54ms` from Amsterdam, NL
145.51.42.126	AS1103 SURF B.V.	`2.70ms` from Amsterdam, NL
145.51.116.126	AS1103 SURF B.V.	`2.58ms` from Amsterdam, NL
145.51.50.32	AS1103 SURF B.V.	`2.62ms` from Amsterdam, NL
145.51.136.82	AS1103 SURF B.V.	`2.39ms` from Amsterdam, NL
145.51.35.126	AS1103 SURF B.V.	`2.73ms` from Amsterdam, NL
145.51.90.10	AS1103 SURF B.V.	`2.62ms` from Amsterdam, NL
145.51.123.126	AS1103 SURF B.V.	`2.67ms` from Amsterdam, NL
145.51.118.100	AS1103 SURF B.V.	`2.62ms` from Amsterdam, NL
145.51.115.126	AS1103 SURF B.V.	`2.75ms` from Amsterdam, NL
145.51.59.11	AS1103 SURF B.V.	`2.58ms` 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
13.80.124.240	AS8075 Microsoft Corporation	`0.33ms` from Amsterdam, NL
13.69.11.64	AS8075 Microsoft Corporation	`0.24ms` from Amsterdam, NL
98.54.10.0	AS7922 Comcast Cable Communications, LLC	`14.85ms` from Atlanta, US
103.210.206.128	AS134918 Blue Net It Soltions Pvt Ltd	`14.09ms` from Bengaluru, IN
94.52.205.16	AS48161 NEXTGEN COMMUNICATIONS SRL	`5.66ms` from Bucharest, RO
35.158.122.192	AS16509 Amazon.com, Inc.	`0.19ms` from Frankfurt am Main, DE
120.51.79.192	AS2519 ARTERIA Networks Corporation	`2.84ms` from Osaka, JP
114.172.15.16	AS4713 NTT DOCOMO BUSINESS,Inc.	`5.27ms` from Osaka, JP
58.169.17.208	AS1221 Telstra Limited	`6.56ms` from Perth, AU
52.5.22.128	AS14618 Amazon.com, Inc.	`0.21ms` from Reston, US
142.255.87.48	AS12271 Charter Communications Inc	`4.61ms` from Secaucus, US
110.35.4.128	AS38684 CMB Daejeon Broadcasting Co,.Ltd	`3.35ms` from Seoul, KR
118.42.252.160	AS4766 Korea Telecom	`5.37ms` from Seoul, KR
97.91.253.176	AS20115 Charter Communications LLC	`3.80ms` from St. Louis, US
178.194.235.80	AS3303 Swisscom (Switzerland) Ltd	`2.47ms` from Zuerich, CH
77.164.98.48	AS1136 KPN B.V.	`1.18ms` from Amsterdam, NL
99.122.191.0	AS7018 AT&T Enterprises, LLC	`17.65ms` from Atlanta, US
49.48.192.208	AS45758 Triple T Broadband Public Company Limited	`3.33ms` from Bangkok, TH
142.4.202.144	AS16276 OVH SAS	`0.18ms` from Beauharnois, CA
52.218.221.16	AS16509 Amazon.com, Inc.	`0.12ms` from Boardman, US
74.42.125.176	AS5650 Frontier Communications of America, Inc.	`9.24ms` from Chicago, US
107.11.178.96	AS10796 Charter Communications Inc	`13.97ms` from Columbus, US
64.236.118.144	AS8075 Microsoft Corporation	`0.34ms` from Des Moines, US
123.179.195.240	AS4134 CHINANET-BACKBONE	`11.07ms` from Hohhot, CN
16.163.81.112	AS16509 Amazon.com, Inc.	`0.13ms` from Hong Kong, HK

Traceroute

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

traceroute -a -n -q1 -f2 -m9 145.51.245.12

traceroute to 145.51.245.12 (145.51.245.12): 9 hops max, 52 byte packets

2 [] 193.239.117.149 0.799 ms

3 [AS1103] 145.145.181.11 2.71 ms

4 [AS1103] 145.145.176.235 2.496 ms

5 [AS1103] 145.145.24.13 2.473 ms

6 [AS1103] 145.145.24.14 2.528 ms

7 *

8 *

9 *

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.

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

An API built with users in mind: reliable, accurate, and easy-to-use

Discover why industry-leading companies around the globe love our data. IPinfo's accurate insights fuel use cases from cybersecurity, data enrichment, web personalization, and much more.

Get Started for Free Contact Sales