139.143.0.0/16

AS209237 · NPL Management LTD

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Summary

Country	United Kingdom
Domain	npl.co.uk
ASN	AS209237
Registry	RIPE
ID	NPL-LEGACY

WHOIS Details

inetnum:        139.143.0.0 - 139.143.255.255
netname:        NPL-LEGACY
org:            ORG-NPL11-RIPE
descr:          NPL Management Ltd
descr:          National Physical Laboratory
descr:          Hampton Road
descr:          Teddington
descr:          Middlesex
descr:          TW11 0LW
country:        GB
admin-c:        DG13162-RIPE
admin-c:        NPL13-RIPE
tech-c:         NPL13-RIPE
tech-c:         DG13162-RIPE
status:         LEGACY
mnt-by:         RIPE-NCC-LEGACY-MNT
mnt-by:         JANET-HOSTMASTER
mnt-routes:     EXPONENTIAL-E-MNT
mnt-routes:     JIPS-NOSC
created:        1970-01-01T00:00:00Z
last-modified:  2022-08-04T09:50:24Z
source:         RIPE
sponsoring-org: ORG-UA23-RIPE
abuse-email:    network.manager@npl.co.uk
abuse-c:        NPLA2-RIPE
abuse-org:      ORG-UA23-RIPE

organisation:   ORG-NPL11-RIPE
org-name:       NPL Management LTD
country:        GB
org-type:       OTHER
address:        National Physical Laboratory
address:        Hampton Road
address:        Teddington
address:        Middlesex
address:        TW11 0LW
address:        United Kingdom
phone:          +44 208 943 6000
e-mail:         network.manager@npl.co.uk
admin-c:        DG13162-RIPE
admin-c:        NPL13-RIPE
tech-c:         DG13162-RIPE
tech-c:         NPL13-RIPE
abuse-c:        NPLA2-RIPE
mnt-ref:        JANET-HOSTMASTER
mnt-by:         JANET-HOSTMASTER
mnt-by:         JIPS-NOSC
created:        2019-03-11T12:30:26Z
last-modified:  2022-12-01T17:21:06Z
source:         RIPE

role:           NPL Network Manager
address:        NPL Management LTD
address:        National Physical Laboratory
address:        Hampton Road
address:        Teddington
address:        Middlesex
address:        TW11 0LW
address:        United Kingdom
phone:          +44 208 943 6000
e-mail:         network.manager@npl.co.uk
nic-hdl:        NPL13-RIPE
mnt-by:         JANET-HOSTMASTER
mnt-by:         JIPS-NOSC
created:        2019-03-11T11:58:03Z
last-modified:  2019-03-11T12:05:25Z
source:         RIPE

person:         Daniel Galbraith
address:        National Physical Laboratory
address:        Hampton Road
address:        Teddington
address:        Middlesex
address:        TW11 0LW
address:        GB
phone:          +44 2089437016
e-mail:         daniel.galbraith@npl.co.uk
nic-hdl:        DG13162-RIPE
mnt-by:         JANET-HOSTMASTER
created:        2022-08-04T09:40:29Z
last-modified:  2022-08-04T09:40:29Z
source:         RIPE

route:          139.143.0.0/16
descr:          NPL Management Ltd
origin:         AS209237
mnt-by:         JIPS-NOSC
created:        2019-03-29T08:16:34Z
last-modified:  2019-03-29T08:16:34Z
source:         RIPE

route:          139.143.0.0/16
descr:          NPL Management Ltd
origin:         AS25180
mnt-by:         EXPONENTIAL-E-MNT
mnt-by:         JIPS-NOSC
created:        2019-03-29T08:16:34Z
last-modified:  2019-03-29T08:16:34Z
source:         RIPE

Nearby Ranges

BGP prefixes that overlap with 139.0.0.0/8

Range	ASN	Company	Num of IPs
139.208.0.0/13	AS4837	China Unicom Jilin province network	524,288
139.192.0.0/14	AS23700	PT. First Media,Tbk	262,144
139.19.0.0/16	AS680	Max-Planck-Institut fuer Informatik, Saarbruecken	65,536
139.203.0.0/16	AS4134	Asia Pacific Network Information Centre	65,536
139.20.0.0/16	AS680	Technische Universitaet Bergakademie Freiberg	65,536
139.18.0.0/16	AS680	Augustusplatz 10	65,536
139.105.0.0/16	AS5619	EVRY Nordic Operations	65,536
139.13.0.0/16	AS680	FH OOW	65,536
139.191.0.0/16	AS680	COMMISSION OF THE EUROPEAN COMMUNITIES	65,536
139.11.0.0/16	AS680	Helmut-Schmidt-Universitaet/Universitaet der Bundeswehr Hamburg	65,536
139.120.0.0/16	AS5619	EVRY Nordic Operations	65,536
139.207.0.0/16	AS4134	Asia Pacific Network Information Centre	65,536
139.17.0.0/16	AS680	Telegrafenberg G261	65,536
139.167.0.0/16	AS55836	Reliance Jio Infocomm Limited	65,536
139.175.0.0/16	AS4780		65,536
139.30.0.0/16	AS680	Rostock	65,536
139.145.0.0/16	AS25400	Aker Maritime	65,536
139.224.0.0/16	AS37963	Aliyun Computing Co., LTD	65,536
139.174.0.0/16	AS680	Clausthal	65,536
139.194.0.0/16	AS23700	Asia Pacific Network Information Centre	65,536
139.202.0.0/16	AS4134	Asia Pacific Network Information Centre	65,536
139.200.0.0/16	AS4134	Asia Pacific Network Information Centre	65,536
139.201.0.0/16	AS4134	Asia Pacific Network Information Centre	65,536
139.126.0.0/16	AS22463	CDK Global, LLC	65,536
139.88.0.0/16	AS270	National Aeronautics and Space Administration	65,536
139.82.0.0/16	AS2715	FACULDADES CATOLICAS	65,536
139.206.0.0/16	AS4134	Asia Pacific Network Information Centre	65,536
139.6.0.0/16	AS680	Campus IT	65,536
139.191.0.0/16	AS42165	COMMISSION OF THE EUROPEAN COMMUNITIES	65,536
139.128.0.0/16	AS2830	Marelli Europe S.p.A.	65,536
139.14.0.0/16	AS2857	Universitaet Koblenz-Landau	65,536
139.192.0.0/16	AS23700	Asia Pacific Network Information Centre	65,536
139.137.0.0/16	AS22093	Cleveland Clinic Foundation	65,536
139.164.0.0/16	AS29695	Vestfold og Telemark FK	65,536
139.225.0.0/16	AS3128	University of Wisconsin - River Falls	65,536
139.241.0.0/16	AS316	DoD Network Information Center	65,536
139.241.0.0/16	AS258	DoD Network Information Center	65,536
139.193.0.0/16	AS23700	Asia Pacific Network Information Centre	65,536
139.196.0.0/16	AS37963	Aliyun Computing Co., LTD	65,536
139.7.0.0/16	AS3209	Vodafone GmbH	65,536
139.241.0.0/16	AS321	DoD Network Information Center	65,536
139.165.0.0/16	AS2611	Universite de Liege (ULg)	65,536
139.241.0.0/16	AS406	DoD Network Information Center	65,536
139.92.0.0/16	AS2686	AT&T Global Network Services Nederland B.V.	65,536
139.189.0.0/16	AS4134	China Telecom	65,536
139.241.0.0/16	AS354	DoD Network Information Center	65,536
139.228.0.0/16	AS23700	PT. First Media,Tbk	65,536
139.169.0.0/16	AS270	National Aeronautics and Space Administration	65,536
139.53.0.0/16	AS3741	ArcelorMittal South Africa Ltd	65,536
139.129.0.0/16	AS37963	Aliyun Computing Co., LTD	65,536

Hosted domains

There are 14 domain names hosted across 7 IP addresses on this ASN. Checkout our API to access full domain hosting information.

IP Address	Domain	Domains on this IP
139.143.5.34	etrainproject.org	2
139.143.236.1	ameynpl.co.uk	1
139.143.5.29	landhypernet.org.uk	1
139.143.5.32	meteoc.org	1

Hosted domains API

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Useful for Cybersecurity

Read more

Pingable IPs

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

IP Address	ASN	Details
139.143.203.254	AS209237 NPL Management LTD	`1.37ms` from London, GB
139.143.5.110	AS209237 NPL Management LTD	`1.40ms` from London, GB
139.143.7.253	AS209237 NPL Management LTD	`1.53ms` from London, GB

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
175.35.109.224	AS4804 Microplex PTY LTD	`8.34ms` from Adelaide, AU
178.225.96.64	AS31615 Odido Netherlands B.V.	`15.41ms` from Amsterdam, NL
117.213.200.48	AS9829 National Internet Backbone	`7.56ms` from Chennai, IN
173.88.74.208	AS10796 Charter Communications Inc	`6.42ms` from Columbus, US
98.100.249.176	AS10796 Charter Communications Inc	`16.89ms` from Columbus, US
34.42.104.208	AS396982 Google LLC	`0.13ms` from Council Bluffs, US
134.3.199.192	AS3209 Vodafone GmbH	`9.29ms` from Frankfurt am Main, DE
192.194.176.176	AS1759 Telia Finland Oyj	`0.93ms` from Helsinki, FI
175.161.119.128	AS4837 CHINA UNICOM China169 Backbone	`8.79ms` from Liaoyang, CN
83.223.161.16	AS15457 NOS Madeira Comunicacoes, S.A.	`19.43ms` from Lisbon, PT
217.78.183.160	AS30833 Technology & Networks LLC	`0.94ms` from Moscow, RU
213.7.230.48	AS6866 Cyprus Telecommunications Authority	`2.18ms` from Nicosia, CY
124.48.16.80	AS17858 LG POWERCOMM	`1.47ms` from Seoul, KR
185.144.49.0	AS58243 TELE AG	`7.41ms` from Berlin, DE
190.85.129.64	AS14080 Telmex Colombia S.A.	`1.11ms` from Bogota, CO
177.235.181.160	AS28573 Claro NXT Telecomunicacoes Ltda	`1.09ms` from Brasilia, BR
198.64.6.80	AS2914 NTT America, Inc.	`0.33ms` from Dallas, US
117.245.172.64	AS9829 National Internet Backbone	`8.95ms` from Delhi, IN
117.201.108.32	AS9829 National Internet Backbone	`12.55ms` from Delhi, IN
47.91.85.0	AS45102 Alibaba (US) Technology Co., Ltd.	`0.84ms` from Frankfurt am Main, DE
211.97.137.48	AS4837 CHINA UNICOM China169 Backbone	`6.92ms` from Fuzhou, CN
34.88.203.208	AS396982 Google LLC	`0.14ms` from Hamina, FI
36.72.220.0	AS7713 PT Telekomunikasi Indonesia	`6.47ms` from Jakarta, ID
176.193.63.96	AS12714 PJSC MegaFon	`1.59ms` from Moscow, RU
59.62.61.96	AS4134 CHINANET-BACKBONE	`4.78ms` from Nanchang, CN

Traceroute

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

traceroute -a -n -q1 -m7 139.143.246.255

traceroute to 139.143.246.255 (139.143.246.255): 7 hops max, 52 byte packets

1 [AS15169] 74.125.251.223 82.847 ms

2 *

3 *

4 [AS25180] 5.148.51.237 84.318 ms

5 *

6 *

7 *

Measurement taken from

IPinfo ProbeNet in Columbus, US

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.

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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