37.1.152.0/21

AS3257 · GTT Communications Inc.

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Summary

Country	United Kingdom
Domain	mdnx.com
ASN	AS3257
Registry	RIPE
ID	UK-EASYNET-20111213

WHOIS Details

inetnum:        37.1.152.0 - 37.1.159.255
netname:        UK-EASYNET-20111213
country:        GB
org:            ORG-EA49-RIPE
admin-c:        MDNX2-RIPE
tech-c:         MDNX1-RIPE
status:         ALLOCATED PA
notify:         ipeng@mdnx.com
mnt-by:         RIPE-NCC-HM-MNT
mnt-by:         EASYNET-UK-MNT
mnt-by:         AS8190-MNT
mnt-routes:     AS8190-MNT
created:        2011-12-13T09:09:05Z
last-modified:  2022-09-05T07:35:16Z
source:         RIPE
abuse-email:    abuse@gtt.net
abuse-c:        AR17615-RIPE
abuse-org:      ORG-EA49-RIPE

organisation:   ORG-EA49-RIPE
org-name:       GTT - EMEA Ltd.
country:        GB
org-type:       LIR
address:        3rd Floor New Castle House,Castle Boulevard
address:        NG7 1FT
address:        Nottingham
address:        UNITED KINGDOM
phone:          +442074897200
fax-no:         +442074897200
mnt-by:         EASYNET-UK-MNT
mnt-ref:        EASYNET-UK-MNT
mnt-ref:        RIPE-NCC-HM-MNT
mnt-by:         RIPE-NCC-HM-MNT
abuse-c:        AR17615-RIPE
admin-c:        TF3383-RIPE
admin-c:        EE1956-RIPE
admin-c:        JB9165-RIPE
admin-c:        CV3892-RIPE
created:        2004-04-17T12:13:55Z
last-modified:  2022-05-12T10:13:21Z
source:         RIPE
e-mail:         netguard@gtt.net

role:           MDNX Network Operations Centre
address:        St James House
address:        Oldbury
address:        Bracknell
address:        RG12 8TH
address:        United Kingdom
phone:          +44 1344 543 700
e-mail:         noc@mdnx.com
remarks:        trouble: For abuse issues - abuse@mdnx.com
remarks:        trouble: For peering requests - peering@mdnx.com
remarks:        trouble: For operational issues - noc@mdnx.com
abuse-mailbox:  abuse@mdnx.com
notify:         ipeng@mdnx.com
admin-c:        MDNX2-RIPE
tech-c:         OOO3-RIPE
tech-c:         MWMW1-RIPE
nic-hdl:        MDNX1-RIPE
mnt-by:         AS8190-MNT
created:        2014-01-31T13:35:11Z
last-modified:  2014-02-03T11:08:26Z
source:         RIPE

role:           MDNX IP Engineering
address:        St James House
address:        Oldbury
address:        Bracknell
address:        RG12 8TH
address:        United Kingdom
phone:          +44 1344 543 700
e-mail:         ipeng@mdnx.com
remarks:        trouble: For abuse issues - abuse@mdnx.com
remarks:        trouble: For peering requests - peering@mdnx.com
remarks:        trouble: For operational issues - noc@mdnx.com
abuse-mailbox:  abuse@mdnx.com
notify:         ipeng@mdnx.com
admin-c:        MWMW1-RIPE
admin-c:        OOO3-RIPE
tech-c:         MWMW1-RIPE
tech-c:         OOO3-RIPE
nic-hdl:        MDNX2-RIPE
mnt-by:         AS8190-MNT
created:        2014-01-31T13:36:59Z
last-modified:  2014-02-03T11:09:39Z
source:         RIPE

route:          37.1.152.0/21
descr:          MDNX Enterprise Services Limited
origin:         AS8190
mnt-by:         AS8190-MNT
created:        2011-12-15T09:44:02Z
last-modified:  2014-01-31T13:47:54Z
source:         RIPE

Nearby Ranges

BGP prefixes that overlap with 37.1.0.0/16

Range	ASN	Company	Num of IPs
37.1.0.0/18	AS34456	Rial Com JSC	16,384
37.1.32.0/19	AS34456	RialCom dynamic pppoe network for customers	8,192
37.1.0.0/19	AS34456	RialCom dynamic pppoe network for customers	8,192
37.1.112.0/20	AS57618	JIntelligence GmbH	4,096
37.1.240.0/20	AS48072	Alsatis SAS	4,096
37.1.216.0/21	AS58061	IROKO Networks Corporation	2,048
37.1.192.0/21	AS28753	IROKO Networks Corporation	2,048
37.1.208.0/21	AS29802	IROKO Networks Corporation	2,048
37.1.96.0/21	AS35826	Netservers Limited	2,048
37.1.200.0/21	AS58061	IROKO Networks Corporation	2,048
37.1.128.0/21	AS48524	VPN (PPPoE) customers Sverdlovsk reg. Interra Ltd.	2,048
37.1.136.0/21	AS48524	VPN (PPPoE) customers Sverdlovsk reg. Interra Ltd.	2,048
37.1.104.0/21	AS49250	onecentral B.V.	2,048
37.1.88.0/21	AS50763	MCKAYCOM	2,048
37.1.184.0/21	AS7155	Skylogic Finland Oy	2,048
37.1.232.0/21	AS51207	Free Mobile SAS	2,048
37.1.176.0/21	AS7155	Skylogic Espana S.L.	2,048
37.1.160.0/21	AS7155	Skylogic Germany GmbH	2,048
37.1.80.0/21	AS197078	Yarnet Ltd	2,048
37.1.72.0/23	AS12389	OJSC Chukotkasvyazinform	512
37.1.104.0/23	AS49250	onecentral B.V.	512
37.1.151.0/24	AS50941	Netinternet Bilisim Teknolojileri AS	256
37.1.145.0/24	AS50941	Vargonen	256
37.1.241.0/24	AS48072	SAS ALSATIS	256
37.1.227.0/24	AS393942	Private Customer	256
37.1.226.0/24	AS207994	Blockchain Creek	256
37.1.228.0/24	AS61317	Private Customer	256
37.1.229.0/24	AS61317	Private Customer	256
37.1.230.0/24	AS61317	Private Customer	256
37.1.231.0/24	AS61317	Private Customer	256
37.1.225.0/24	AS153993	Internet Utilities Europe and Asia Limited	256
37.1.162.0/24	AS7155	Skylogic Germany GmbH	256
37.1.75.0/24	AS12389	OJSC Chukotkasvyazinform	256
37.1.74.0/24	AS12389	OJSC Chukotkasvyazinform	256
37.1.184.0/24	AS7155	Skylogic Finland Oy	256
37.1.224.0/24	AS9304	Private Customer	256

Hosted domains

There are no domains currently hosted on this ASN.

Hosted domains API

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Pingable IPs

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

IP Address	ASN	Details
37.1.152.61	AS3257 GTT Communications Inc.	`0.42ms` from London, GB
37.1.159.42	AS3257 GTT Communications Inc.	`3.48ms` from London, GB
37.1.155.81	AS3257 GTT Communications Inc.	`0.42ms` from London, GB
37.1.158.201	AS3257 GTT Communications Inc.	`2.74ms` from London, GB
37.1.153.81	AS3257 GTT Communications Inc.	`0.55ms` from London, GB
37.1.154.237	AS3257 GTT Communications Inc.	`0.56ms` from London, GB
37.1.156.197	AS3257 GTT Communications Inc.	`0.69ms` 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
68.35.183.165	AS7922 Comcast Cable Communications, LLC	`9.86ms` from Atlanta, US
63.104.4.85	AS701 Verizon Business	`2.38ms` from Boston, US
87.156.156.117	AS3320 Deutsche Telekom AG	`4.69ms` from Hamburg, DE
109.49.209.149	AS2860 NOS COMUNICACOES, S.A.	`8.32ms` from Lisbon, PT
80.189.69.213	AS6871 Plusnet	`4.00ms` from London, GB
66.146.105.69	AS11123 Ultimate Internet Access, Inc	`2.91ms` from Los Angeles, US
38.173.115.85	AS398823 PEG TECH INC	`0.29ms` from Los Angeles, US
34.0.219.53	AS15169 Google LLC	`0.12ms` from Madrid, ES
15.223.190.53	AS16509 Amazon.com, Inc.	`0.80ms` from Montreal, CA
5.128.182.181	AS31200 Novotelecom Ltd	`1.37ms` from Novosibirsk, RU
82.209.49.181	AS30764 PODA a.s.	`3.52ms` from Prague, CZ
35.175.78.133	AS14618 Amazon.com, Inc.	`0.18ms` from Reston, US
174.55.200.197	AS7922 Comcast Cable Communications, LLC	`18.45ms` from Reston, US
49.238.157.117	AS38690 HyosungITX	`1.01ms` from Seoul, KR
180.71.115.85	AS9318 SK Broadband Co Ltd	`5.35ms` from Seoul, KR
3.104.94.5	AS16509 Amazon.com, Inc.	`0.12ms` from Sydney, AU
78.142.87.229	AS35579 KELAG-Karntner Elektrizitats - Aktiengesellschaft	`5.74ms` from Vienna, AT
84.83.179.5	AS1136 KPN B.V.	`2.37ms` from Amsterdam, NL
65.125.1.165	AS209 CenturyLink Communications, LLC	`1.87ms` from Ashburn, US
99.159.65.213	AS7018 AT&T Enterprises, LLC	`17.69ms` from Atlanta, US
34.80.168.229	AS396982 Google LLC	`0.14ms` from Chang-hua, TW
172.222.83.69	AS20115 Charter Communications LLC	`9.99ms` from Chicago, US
98.222.255.21	AS7922 Comcast Cable Communications, LLC	`4.91ms` from Chicago, US
123.26.38.229	AS45899 VNPT Corp	`2.31ms` from Da Nang, VN
46.94.74.197	AS3320 Deutsche Telekom AG	`7.96ms` from Frankfurt am Main, DE

Traceroute

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

traceroute -a -n -q1 -f3 37.1.154.237

traceroute to 37.1.154.237 (37.1.154.237): 64 hops max, 52 byte packets

3 [AS3257] 195.72.82.241 0.203 ms

4 [AS3257] 37.1.154.237 1 ms

Measurement taken from

IPinfo ProbeNet in London, GB

On October 30th 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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