138.81.128.0/18

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 138.81.128.0/18

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

Hosted domains

There are 17 domain names hosted across 6 IP addresses on this ASN. Checkout our API to access full domain hosting information.

IP Address	Domain	Domains on this IP
138.81.131.157	isoconnect.net	4
138.81.131.212	isocat.org	2
138.81.131.238	standardspavilion.org	2
138.81.131.113	standardsinfo.net	1
138.81.131.100	wssn.net	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

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

IP Address	ASN	Details
138.81.131.147	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
13.82.231.114	AS8075 Microsoft Corporation	`0.40ms` from Ashburn, US
93.128.145.194	AS6805 Telefonica Germany GmbH & Co.OHG	`2.69ms` from Berlin, DE
201.57.199.98	AS4230 CLARO S.A.	`1.26ms` from Brasilia, BR
181.85.1.98	AS7303 Telecom Argentina S.A.	`0.59ms` from Buenos Aires, AR
52.142.178.98	AS8075 Microsoft Corporation	`0.22ms` from Cardiff, GB
151.252.165.82	AS35706 Net at Once Sweden AB	`2.18ms` from Copenhagen, DK
91.72.6.226	AS15802 Emirates Integrated Telecommunications Company PJSC	`3.87ms` from Dubai, AE
185.70.252.18	AS39151 AXESS Networks Solutions Germany GmbH	`3.23ms` from Duesseldorf, DE
79.200.155.66	AS3320 Deutsche Telekom AG	`6.28ms` from Frankfurt am Main, DE
79.203.207.146	AS3320 Deutsche Telekom AG	`5.47ms` from Frankfurt am Main, DE
208.88.152.2	AS10780 Pure Storage, INC.	`2.48ms` from Fremont, US
85.194.194.2	AS47605 FNE Finland Oy AS	`0.89ms` from Helsinki, FI
194.75.163.178	AS2856 British Telecommunications PLC	`2.38ms` from London, GB
82.60.129.114	AS3269 Telecom Italia S.p.A.	`5.36ms` from Milan, IT
72.187.204.2	AS33363 Charter Communications, Inc	`4.85ms` from Orlando, US
180.145.60.50	AS17511 OPTAGE Inc.	`2.90ms` from Osaka, JP
86.200.114.50	AS3215 Orange S.A.	`11.03ms` from Paris, FR
108.83.188.66	AS7018 AT&T Enterprises, LLC	`6.66ms` from Redding, US
201.144.36.194	AS8151 UNINET	`0.47ms` from Santiago de Queretaro, MX
122.39.42.2	AS17858 LG POWERCOMM	`1.94ms` from Seoul, KR
1.167.255.2	AS3462 Data Communication Business Group	`1.47ms` from Taipei, TW
35.73.157.130	AS16509 Amazon.com, Inc.	`0.19ms` from Tokyo, JP
81.223.109.82	AS8412 T-Mobile Austria GmbH	`1.45ms` from Vienna, AT
111.6.89.34	AS24445 Henan Mobile Communications Co.,Ltd	`13.58ms` from Beijing, CN
89.147.82.2	AS41897 Sat-Trakt D.O.O.	`1.71ms` from Belgrade, RS

Traceroute

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

traceroute -a -n -q1 -f3 -m14 138.81.183.39

traceroute to 138.81.183.39 (138.81.183.39): 14 hops max, 52 byte packets

3 [] 206.72.211.54 8.982 ms

4 [AS3303] 138.187.129.236 165.144 ms

5 [AS3303] 138.187.129.49 144.968 ms

6 [AS3303] 138.187.141.1 143.201 ms

7 [AS3303] 217.193.0.142 142.91 ms

8 *

9 [AS3303] 195.144.55.162 142.919 ms

10 *

11 [AS3303] 195.144.55.162 142.952 ms

12 *

13 *

14 *

Measurement taken from

IPinfo ProbeNet in Los Angeles, US

On September 4th 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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