138.81.0.0/18

AS3303 · Swisscom (Switzerland) Ltd

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Summary

Country	Switzerland
Domain	iso.org
ASN	AS3303
Parent Range	138.81.0.0/16
Registry	RIPE
ID	ISO-CS

WHOIS Details

inetnum:        138.81.0.0 - 138.81.255.255
netname:        ISO-CS
descr:          ISO Central Secretariat
descr:          Chemin de Blandonnet 8
descr:          CP 401
descr:          Vernier
descr:          CH-1214
country:        CH
admin-c:        LP10068-RIPE
admin-c:        RA11963-RIPE
admin-c:        SMSM4-RIPE
tech-c:         SMSM4-RIPE
tech-c:         LP10068-RIPE
status:         LEGACY
mnt-by:         ERX-NET-138-81-2024-MNT
mnt-lower:      ERX-NET-138-81-2024-MNT
mnt-routes:     ERX-NET-138-81-MNT
mnt-routes:     CH-UNISOURCE-MNT
created:        1970-01-01T00:00:00Z
last-modified:  2024-10-02T13:27:39Z
source:         RIPE

role:           RIPE ADMIN
address:        Chemin de Blandonnet 8, 1214 Vernier, Geneva
e-mail:         security@iso.org
nic-hdl:        RA11963-RIPE
mnt-by:         ERX-NET-138-81-2024-MNT
created:        2024-10-02T13:24:58Z
last-modified:  2024-10-02T13:24:58Z
source:         RIPE

person:         Jeffrey POULIN
address:        ISO Central Secretariat
address:        Chemin de Blandonnet 8
address:        1214 Vernier, Geneva
phone:          +41227490275
e-mail:         poulin@iso.org
nic-hdl:        LP10068-RIPE
mnt-by:         ERX-NET-138-81-2015MNT
created:        2015-05-05T14:42:50Z
last-modified:  2017-06-27T13:22:53Z
source:         RIPE

person:         Security Manager Security Manager
address:        1, Rue de Varembe
address:        Geneva
address:        CH-1211
address:        CH
phone:          +41 22 749 01 11
e-mail:         security@iso.org
nic-hdl:        SMSM4-RIPE
mnt-by:         RIPE-ERX-MNT
created:        2003-11-10T17:15:40Z
last-modified:  2003-11-10T17:15:40Z
source:         RIPE

route:          138.81.0.0/16
descr:          ISO
descr:          IP-Plus
origin:         AS3303
mnt-by:         CH-UNISOURCE-MNT
created:        2019-03-18T11:29:28Z
last-modified:  2019-03-18T11:29:28Z
source:         RIPE

Overlapping Ranges

BGP prefixes that contain 138.81.0.0/18

Range	ASN	Company	Num of IPs
138.81.0.0/16	AS3303	ISO Central Secretariat	65,536

Hosted domains

There is 1 domain name hosted across 1 IP address on this ASN. Checkout our API to access full domain hosting information.

IP Address	Domain	Domains on this IP
138.81.11.29	isoconferencing.org	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

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

IP Address	ASN	Details
138.81.10.240	AS3303 Swisscom (Switzerland) Ltd	`0.57ms` from Geneve, CH
138.81.35.124	AS3303 Swisscom (Switzerland) Ltd	`0.61ms` from Geneve, CH

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
188.4.99.146	AS1241 Forthnet	`9.95ms` from Athens, GR
143.233.204.242	AS5408 National Infrastructures for Research and Technology S.A.	`2.00ms` from Athens, GR
219.89.122.2	AS4771 Spark New Zealand Trading Ltd.	`0.78ms` from Auckland, NZ
5.190.220.2	AS58224 Iran Telecommunication Company PJS	`15.57ms` from Az Za`ayin, QA
58.83.219.162	AS23724 IDC, China Telecommunications Corporation	`3.52ms` from Beijing, CN
152.66.47.2	AS2547 Budapest University of Technology and Economics	`0.62ms` from Budapest, HU
73.44.54.66	AS7922 Comcast Cable Communications, LLC	`4.98ms` from Chicago, US
212.117.65.98	AS8422 NetCologne Gesellschaft fur Telekommunikation mbH	`1.67ms` from Duesseldorf, DE
203.124.11.114	AS38277 CommuniLink Internet Limited.	`2.12ms` from Hong Kong, HK
217.30.204.66	AS49223 EVEREST TV AND RADIO COMPANY LLC	`3.06ms` from Kyiv, UA
156.233.151.2	AS51809 BRSK Limited	`0.41ms` from London, GB
68.7.18.194	AS22773 Cox Communications Inc.	`6.96ms` from Los Angeles, US
23.220.157.162	AS16625 Akamai Technologies, Inc.	`0.10ms` from Madrid, ES
34.47.151.50	AS396982 Google LLC	`0.09ms` from Mumbai, IN
64.20.45.178	AS19318 Interserver, Inc	`0.55ms` from New York City, US
210.92.76.114	AS3786 LG DACOM Corporation	`6.00ms` from Seoul, KR
175.215.200.2	AS4766 Korea Telecom	`6.97ms` from Seoul, KR
125.143.119.130	AS4766 Korea Telecom	`6.13ms` from Seoul, KR
121.154.72.130	AS4766 Korea Telecom	`4.51ms` from Seoul, KR
118.189.142.98	AS17547 M1 NET LTD	`2.03ms` from Singapore, SG
129.153.181.34	AS31898 Oracle Corporation	`0.34ms` from Ashburn, US
98.24.55.130	AS11426 Charter Communications Inc	`3.79ms` from Charlotte, US
97.70.143.162	AS33363 Charter Communications, Inc	`11.99ms` from Chicago, US
181.90.234.2	AS7303 Telecom Argentina S.A.	`11.60ms` from Cordoba, AR
108.139.99.66	AS16509 Amazon.com, Inc.	`0.10ms` from Fortaleza, BR

Traceroute

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

traceroute -a -n -q1 -f3 -m10 138.81.0.48

traceroute to 138.81.0.48 (138.81.0.48): 10 hops max, 52 byte packets

3 [AS174] 149.6.55.65 0.991 ms

4 [AS174] 154.25.15.21 0.923 ms

5 [AS174] 149.6.54.98 11.066 ms

6 [AS3303] 138.187.141.1 0.851 ms

7 [AS3303] 217.193.0.142 0.642 ms

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Measurement taken from

IPinfo ProbeNet in Geneve, CH

On September 4th 2025

What are IP address ranges?

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