138.4.0.0/16

AS766 · RedIRIS Autonomous System

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Summary

Country	Spain
Domain	upm.es
ASN	AS766
Registry	RIPE
ID	UPM

WHOIS Details

inetnum:        138.4.0.0 - 138.4.255.255
netname:        UPM
descr:          Universidad Politecnica de Madrid
descr:          Madrid, Spain
country:        ES
admin-c:        JDSD3-RIPE
tech-c:         JDSD3-RIPE
abuse-c:        IRIS5-RIPE
status:         LEGACY
mnt-irt:        IRT-IRISCERT
remarks:        Incident handling for organizations affiliated with RedIRIS
remarks:        Spanish Academic and Research Network.
remarks:        emergency phone number +34 647 300 717
remarks:        timezone GMT+01 (GMT+02 with DST)
remarks:        use cert@iriscert.es for security, spam and abuse notifications
mnt-by:         REDIRIS-NMC
created:        1970-01-01T00:00:00Z
last-modified:  2025-04-07T10:54:13Z
source:         RIPE
abuse-email:    cert@iriscert.es
abuse-c:        IRIS5-RIPE
abuse-org:      ORG-IANA1-RIPE

person:         Jefe del Servicio de Planificacion Informatica y Comunicaciones
address:        Servicio de Planificacion Informatica y Comunicaciones
address:        Universidad Politecnica de Madrid
address:        Avda. Ramiro de Maeztu, 7
address:        Ciudad Universitaria
address:        E-28040 Madrid
address:        SPAIN
phone:          +34 913364600
fax-no:         +34 913366195
e-mail:         hostmaster@upm.es
nic-hdl:        JDSD3-RIPE
notify:         iris-nic@rediris.es
mnt-by:         REDIRIS-NMC
mnt-by:         UPM-NMC
created:        2017-01-25T11:49:49Z
last-modified:  2017-10-30T23:36:26Z
source:         RIPE

route:          138.4.0.0/16
descr:          UPM
origin:         AS766
mnt-by:         REDIRIS-NMC
created:        1970-01-01T00:00:00Z
last-modified:  2005-12-13T08:04:09Z
source:         RIPE

Nearby Ranges

BGP prefixes that overlap with 138.0.0.0/8

Range	ASN	Company	Num of IPs
138.63.0.0/16	AS1715	Centre Europeen de Recherches et Formation Avancee en Calcul Scientifique	65,536
138.110.0.0/16	AS396128	Mount Holyoke College	65,536
138.116.0.0/16	AS33004	SUNY Empire State University	65,536
138.26.0.0/16	AS3452	University of Alabama at Birmingham - University Computer Center	65,536
138.6.0.0/16	AS38956	Uppsala local government	65,536
138.225.0.0/16	AS20868	ABB Information Systems Ltd	65,536
138.101.0.0/16	AS9593	Nikkei Inc.	65,536
138.210.0.0/16	AS14921	CenturyLink Communications, LLC	65,536
138.232.0.0/16	AS1110	University of Innsbruck	65,536
138.50.0.0/16	AS367	Headquarters, USAISC	65,536
138.14.0.0/16	AS8434	Saab AB	65,536
138.44.0.0/16	AS7575	Australian Academic and Research Network	65,536
138.213.0.0/16	AS8075	Microsoft Limited	65,536
138.105.0.0/16	AS8075	Microsoft Limited	65,536
138.132.0.0/16	AS20746	Italtel SPA	65,536
138.22.0.0/16	AS1853	GeoSphere Austria	65,536
138.15.0.0/16	AS10753	NEC Laboratories America, Inc.	65,536
138.27.0.0/16	AS1540	Headquarters, USAISC	65,536
138.37.0.0/16	AS198864	Queen Mary University of London	65,536
138.85.0.0/16	AS8147	Ericsson Inc.	65,536
138.91.0.0/16	AS8075	Microsoft Corp	65,536
138.67.0.0/16	AS36704	Colorado School of Mines	65,536
138.119.0.0/16	AS611	University of New Brunswick	65,536
138.239.0.0/16	AS8075	Microsoft Singapore Pte. Ltd.	65,536
138.25.0.0/16	AS7575	University of Technology Sydney	65,536
138.73.0.0/16	AS611	Mount Allison University	65,536
138.220.0.0/16	AS10497	IBRD	65,536
138.47.0.0/16	AS19564	Louisiana Tech University	65,536
138.100.0.0/16	AS766	Universidad Politecnica de Madrid	65,536
138.210.0.0/16	AS11398	CenturyLink Communications, LLC	65,536
138.41.0.0/16	AS137	DIR-GARR - Roma	65,536
138.130.0.0/16	AS1221	Telstra Limited	65,536
138.217.0.0/16	AS1221	Telstra Limited	65,536
138.189.0.0/16	AS12511	Post CH AG	65,536
138.191.0.0/16	AS12511	Post CH AG	65,536
138.246.0.0/16	AS12816	Ludwig-Maximilians-Universitaet Muenchen	65,536
138.86.0.0/16	AS15295	University of Northern Colorado	65,536
138.92.0.0/16	AS11482	Canisius College	65,536
138.233.0.0/16	AS56736	Vastra Gotalandsregionen	65,536
138.80.0.0/16	AS58611	Charles Darwin University	65,536
138.190.0.0/16	AS3303	Berne, Switzerland	65,536
138.13.0.0/16	AS56	Air Force Systems Networking	65,536
138.210.0.0/16	AS5778	CenturyLink Communications, LLC	65,536
138.180.0.0/16	AS5839	Navy Network Information Center (NNIC)	65,536
138.247.0.0/16	AS23122	Dakota State University	65,536
138.51.0.0/16	AS239	University of Toronto	65,536
138.81.0.0/16	AS3303	ISO Central Secretariat	65,536
138.131.0.0/16	AS559	CSEM Centre Suisse d'Electronique et de Microtechnique SA - Recherche et Developpement	65,536
138.78.0.0/16	AS396087	St. Mary's College of Maryland	65,536

Hosted domains

There are 82 domain names hosted across 43 IP addresses on this ASN. Checkout our API to access full domain hosting information.

IP Address	Domain	Domains on this IP
138.4.84.21	expominerales.com	12
138.4.83.136	adaptatividad.net	10
138.4.32.2	efemebe.es	4
138.4.92.182	midialisis.es	4
138.4.83.138	proyectomaria.es	3
138.4.92.33	bahagiamasuk14.com	3
138.4.22.156	educainternet.es	2
138.4.4.221	notaburras.es	2
138.4.92.32	daetsiae.es	2
138.4.92.26	sma777.com	2
138.4.22.19	vishub.org	2
138.4.92.31	daetsimfmn.es	2
138.4.92.162	transyt-projects.es	2
138.4.92.155	dssalud.es	2
138.4.92.40	rahasiaslot.org	2
138.4.92.136	cbms-conference.org	2
138.4.92.153	smartdiabetes.eu	1
138.4.92.239	rcolomo.com	1
138.4.92.20	daupm.es	1
138.4.92.165	gisai.eu	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

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Pingable IPs

7,173 IPs in this range replied to an ICMP ping during our most recent internet scan. Learn more.

IP Address	ASN	Details
138.4.42.82	AS766 RedIRIS Autonomous System	`0.73ms` from Madrid, ES
138.4.27.120	AS766 RedIRIS Autonomous System	`0.73ms` from Madrid, ES
138.4.80.24	AS766 RedIRIS Autonomous System	`0.72ms` from Madrid, ES
138.4.53.60	AS766 RedIRIS Autonomous System	`0.72ms` from Madrid, ES
138.4.81.21	AS766 RedIRIS Autonomous System	`0.71ms` from Madrid, ES
138.4.26.42	AS766 RedIRIS Autonomous System	`0.72ms` from Madrid, ES
138.4.37.24	AS766 RedIRIS Autonomous System	`0.74ms` from Madrid, ES
138.4.31.187	AS766 RedIRIS Autonomous System	`0.75ms` from Madrid, ES
138.4.92.64	AS766 RedIRIS Autonomous System	`0.72ms` from Madrid, ES
138.4.28.11	AS766 RedIRIS Autonomous System	`0.72ms` from Madrid, ES
138.4.48.252	AS766 RedIRIS Autonomous System	`0.71ms` from Madrid, ES
138.4.100.57	AS766 RedIRIS Autonomous System	`0.74ms` from Madrid, ES
138.4.43.115	AS766 RedIRIS Autonomous System	`0.73ms` from Madrid, ES
138.4.78.2	AS766 RedIRIS Autonomous System	`0.72ms` from Madrid, ES
138.4.52.59	AS766 RedIRIS Autonomous System	`0.72ms` from Madrid, ES
138.4.40.65	AS766 RedIRIS Autonomous System	`0.73ms` from Madrid, ES
138.4.33.25	AS766 RedIRIS Autonomous System	`0.72ms` from Madrid, ES
138.4.58.35	AS766 RedIRIS Autonomous System	`0.74ms` from Madrid, ES
138.4.73.85	AS766 RedIRIS Autonomous System	`0.73ms` from Madrid, ES
138.4.7.131	AS766 RedIRIS Autonomous System	`0.72ms` from Madrid, ES
138.4.89.35	AS766 RedIRIS Autonomous System	`0.74ms` from Madrid, ES
138.4.63.30	AS766 RedIRIS Autonomous System	`0.76ms` from Madrid, ES
138.4.76.105	AS766 RedIRIS Autonomous System	`0.71ms` from Madrid, ES
138.4.6.54	AS766 RedIRIS Autonomous System	`0.73ms` from Madrid, ES
138.4.68.61	AS766 RedIRIS Autonomous System	`0.73ms` from Madrid, ES

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
185.110.172.16	AS35470 Signet B.V.	`0.65ms` from Amsterdam, NL
52.32.21.208	AS16509 Amazon.com, Inc.	`0.10ms` from Boardman, US
113.205.147.48	AS4837 CHINA UNICOM China169 Backbone	`1.89ms` from Chongqing, CN
3.136.169.160	AS16509 Amazon.com, Inc.	`0.17ms` from Columbus, US
204.157.104.128	AS265622 WISTARIP S DE RL DE CV	`5.44ms` from Guadalajara, MX
27.42.236.208	AS17816 China Unicom IP network China169 Guangdong province	`5.25ms` from Guangzhou, CN
223.104.207.64	AS9808 China Mobile Communications Group Co., Ltd.	`16.69ms` from Lanzhou, CN
142.129.74.208	AS20001 Charter Communications Inc	`3.83ms` from Los Angeles, US
47.145.219.32	AS5650 Frontier Communications of America, Inc.	`2.52ms` from Los Angeles, US
91.1.22.144	AS3320 Deutsche Telekom AG	`2.89ms` from Nuernberg, DE
101.235.32.0	AS10036 DLIVE	`1.76ms` from Seoul, KR
222.140.42.224	AS4837 CHINA UNICOM China169 Backbone	`2.66ms` from Zhengzhou, CN
23.226.237.192	AS3842 InMotion Hosting, Inc.	`0.26ms` from Atlanta, US
186.39.38.160	AS22927 Telefonica de Argentina	`2.42ms` from Buenos Aires, AR
185.222.171.240	AS205309 Prodec Networks Ltd	`2.07ms` from London, GB
82.1.237.48	AS5089 Virgin Media Limited	`16.54ms` from London, GB
76.169.54.144	AS20001 Charter Communications Inc	`5.60ms` from Los Angeles, US
122.195.148.208	AS4837 CHINA UNICOM China169 Backbone	`4.83ms` from Nanjing, CN
91.168.200.64	AS12322 Free SAS	`2.33ms` from Paris, FR
52.175.249.192	AS8075 Microsoft Corporation	`0.16ms` from Quincy, US
13.223.115.192	AS14618 Amazon.com, Inc.	`0.20ms` from Reston, US
61.47.225.0	AS17597 SK Broadband Co Ltd	`2.19ms` from Seoul, KR
119.148.156.0	AS18313 LG HelloVision Corp.	`1.50ms` from Seoul, KR
79.183.214.32	AS8551 Bezeq International Ltd.	`3.11ms` from Tel Aviv, IL
114.184.221.144	AS4713 NTT DOCOMO BUSINESS,Inc.	`11.56ms` from Tokyo, JP

Traceroute

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

traceroute -a -n -q1 -f3 -m9 138.4.105.205

traceroute to 138.4.105.205 (138.4.105.205): 9 hops max, 52 byte packets

3 [AS3356] 171.75.8.87 27.284 ms

4 [AS3356] 213.242.114.122 27.967 ms

5 [AS766] 130.206.212.106 27.768 ms

6 [AS766] 193.145.14.234 27.863 ms

7 *

8 *

9 *

Measurement taken from

IPinfo ProbeNet in Amsterdam, NL

On November 14th 2025

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