145.81.0.0/16

AS1103 · SURF B.V.

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Summary

Country	Netherlands
Domain	surfnet.nl
ASN	AS1103
Registry	RIPE
ID	SURFNET-EARLY-REGISTRATIONS

WHOIS Details

inetnum:        145.81.0.0 - 145.81.255.255
netname:        SURFNET-EARLY-REGISTRATIONS
descr:          SURFnet bv
descr:          P.O. Box 19035
descr:          Utrecht
descr:          3501 DA
org:            ORG-Sb3-RIPE
country:        NL
admin-c:        SNS1-RIPE
tech-c:         SNS1-RIPE
status:         LEGACY
remarks:        ---------------------------------------------------
remarks:        Use only cert@surfnet.nl to report security incidents.
remarks:        See also http://cert.surfnet.nl/ for more information.
remarks:        ---------------------------------------------------
mnt-by:         RIPE-NCC-LEGACY-MNT
mnt-by:         SN-LIR-MNT
mnt-lower:      SN-LIR-MNT
mnt-routes:     AS1103-MNT
created:        2019-06-06T13:01:51Z
last-modified:  2019-06-06T13:01:51Z
source:         RIPE
abuse-email:    cert@surfcert.nl
abuse-c:        SNS1-RIPE
abuse-org:      ORG-Sb3-RIPE

organisation:   ORG-Sb3-RIPE
org-name:       SURF B.V.
country:        NL
org-type:       LIR
address:        P.O. Box 19035
address:        3501 DA
address:        Utrecht
address:        NETHERLANDS
phone:          +31887873000
e-mail:         lir@surf.nl
admin-c:        HT3384-RIPE
admin-c:        MK512-RIPE
admin-c:        SNS1-RIPE
admin-c:        WB311-RIPE
admin-c:        NO17-RIPE
admin-c:        RS957-RIPE
admin-c:        JO5863-RIPE
admin-c:        MM57501-RIPE
abuse-c:        SNS1-RIPE
mnt-ref:        RIPE-NCC-HM-MNT
mnt-ref:        SN-LIR-MNT
mnt-by:         RIPE-NCC-HM-MNT
mnt-by:         SN-LIR-MNT
created:        2004-04-17T11:43:29Z
last-modified:  2023-02-21T13:35:38Z
source:         RIPE
abuse-email:    cert@surfcert.nl
abuse-c:        SNS1-RIPE
abuse-org:      undefined

role:           SURF Network Maintainer
address:        Kantoren Hoog Overborch (Hoog Catharijne)
address:        Moreelsepark 48, 3511 EP Utrecht
address:        Postbus 19035, 3501 DA Utrecht
phone:          +31 88 7873000
admin-c:        WB311-RIPE
tech-c:         NO17-RIPE
tech-c:         WB311-RIPE
tech-c:         MK512-RIPE
tech-c:         JO5863-RIPE
tech-c:         MM57501-RIPE
tech-c:         BW4086-RIPE
tech-c:         EV4604-RIPE
nic-hdl:        SNS1-RIPE
abuse-mailbox:  cert@surfcert.nl
mnt-by:         AS1103-MNT
created:        2002-07-09T10:06:06Z
last-modified:  2025-11-05T14:44:07Z
source:         RIPE
e-mail:         noc@surf.nl

route:          145.81.0.0/16
descr:          HOHONET
origin:         AS1103
notify:         lir@surfnet.nl
mnt-by:         AS1103-MNT
created:        2002-02-27T13:45:19Z
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
145.26.0.0/16	AS3917	Shell Information Technology International	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
145.58.0.0/16	AS25182	Publieke Omroep Nederland	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
145.85.0.0/16	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
145.51.0.0/16	AS1103	Hogeschool Rotterdam & Omstreken	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

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Pingable IPs

No IPs in this range replied to an ICMP ping during our most recent internet scan. Learn more.

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
73.86.46.112	AS7922 Comcast Cable Communications, LLC	`11.38ms` from Ashburn, US
99.194.64.0	AS22561 CenturyLink Communications, LLC	`12.49ms` from Atlanta, US
86.35.236.0	AS9050 Orange Romania S.A.	`0.27ms` from Bucharest, RO
70.123.151.48	AS11427 Charter Communications Inc	`6.21ms` from Dallas, US
97.120.119.16	AS209 CenturyLink Communications, LLC	`1.45ms` from Hillsboro, US
156.249.236.176	AS139880 OWGELS INTERNATIONAL CO., LIMITED	`0.43ms` from Hong Kong, HK
81.147.142.112	AS2856 British Telecommunications PLC	`2.83ms` from London, GB
71.190.80.96	AS701 Verizon Business	`7.83ms` from New York City, US
119.231.67.80	AS17511 OPTAGE Inc.	`1.24ms` from Osaka, JP
88.127.221.96	AS12322 Free SAS	`3.11ms` from Paris, FR
34.200.47.176	AS14618 Amazon.com, Inc.	`0.18ms` from Reston, US
190.215.13.144	AS18822 Manquehuenet	`1.46ms` from Santiago, CL
58.143.174.32	AS10036 DLIVE	`5.93ms` from Seoul, KR
217.142.128.0	AS31898 Oracle Corporation	`0.49ms` from Seoul, KR
140.207.111.144	AS17621 China Unicom Shanghai network	`3.05ms` from Shanghai, CN
139.99.248.176	AS16276 OVH SAS	`0.13ms` from Sydney, AU
96.49.198.64	AS6327 Shaw Communications	`7.31ms` from Vancouver, CA
20.238.206.128	AS8075 Microsoft Corporation	`0.23ms` from Amsterdam, NL
204.204.130.64	AS7421 Sprint	`0.12ms` from Ashburn, US
52.249.199.112	AS8075 Microsoft Corporation	`0.48ms` from Ashburn, US
5.55.55.112	AS3329 VODAFONE-PANAFON HELLENIC TELECOMMUNICATIONS COMPANY SA	`1.31ms` from Athens, GR
111.193.177.16	AS4808 China Unicom Beijing Province Network	`3.59ms` from Beijing, CN
213.49.142.128	AS5432 Proximus NV	`2.49ms` from Brussels, BE
38.7.46.16	AS52354 Atlantica Video Cable S.A.	`6.43ms` from Buenos Aires, AR
119.84.160.64	AS134420 Chongqing Telecom	`0.39ms` from Chongqing, CN

Traceroute

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

traceroute -a -n -q1 -f4 -m12 145.81.19.131

traceroute to 145.81.19.131 (145.81.19.131): 12 hops max, 52 byte packets

4 [] 80.249.208.34 11.342 ms

5 [AS1103] 145.145.181.11 12.925 ms

6 [AS1103] 145.145.176.71 12.823 ms

7 [AS1103] 145.145.176.163 12.697 ms

8 [AS1103] 145.145.4.161 12.576 ms

9 [AS1103] 145.145.4.162 18.203 ms

10 *

11 *

12 *

Measurement taken from

IPinfo ProbeNet in Copenhagen, DK

On December 6th 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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