141.136.96.0/20

inetnum:        141.136.96.0 - 141.136.111.255
netname:        US-GTTCOMMUNICATIONS-20110629
org:            ORG-GCI2-RIPE
descr:          GTT
country:        IE
country:        NL
country:        GB
country:        HK
country:        BE
country:        AT
country:        NO
country:        DK
country:        CA
country:        DE
country:        GR
country:        SE
country:        RO
country:        SG
country:        CH
country:        IT
country:        PL
country:        CZ
country:        US
country:        ES
country:        SK
country:        FR
admin-c:        SE33-RIPE
tech-c:         TK333-RIPE
tech-c:         NET3257-RIPE
status:         ALLOCATED PA
notify:         tobias.kuettner@gtt.net
notify:         netguard@gtt.net
mnt-by:         RIPE-NCC-HM-MNT
mnt-by:         AS3257-ROOT-MNT
mnt-lower:      AS3257-NET-MNT
mnt-domains:    AS3257-NET-MNT
mnt-routes:     AS3257-ROUTE-MNT
created:        2017-02-13T10:39:13Z
last-modified:  2017-02-16T09:39:44Z
source:         RIPE
abuse-email:    abuse@gtt.net
abuse-c:        AR37017-RIPE
abuse-org:      ORG-GCI2-RIPE

organisation:   ORG-GCI2-RIPE
org-name:       GTT Communications Inc.
org-type:       LIR
address:        Hugenottenallee 167
address:        63263
address:        Neu-Isenburg
address:        GERMANY
e-mail:         noc@gtt.net
admin-c:        TK7169-RIPE
tech-c:         TK7169-RIPE
abuse-c:        AR37017-RIPE
mnt-ref:        AS3257-ROOT-MNT
mnt-by:         RIPE-NCC-HM-MNT
mnt-by:         AS3257-ROOT-MNT
created:        2016-07-19T07:50:40Z
last-modified:  2016-07-19T07:50:42Z
source:         RIPE
phone:          +1 703 442 5500

role:           AS3257 Net Admin
address:        GTT
address:        Hugenottenallee 167
address:        63263 Neu-Isenburg
address:        Germany
phone:          +49 6102 8235381
e-mail:         netguard@gtt.net
remarks:        Information: http://www.gtt.net
remarks:        Concerning abuse and spam ... mailto: abuse@gtt.net
abuse-mailbox:  abuse@gtt.net
admin-c:        SE33-RIPE
tech-c:         TK333-RIPE
nic-hdl:        NET3257-RIPE
remarks:        hostmaster role account
notify:         netguard@gtt.net
mnt-by:         AS3257-PERS-MNT
created:        2009-07-06T08:22:53Z
last-modified:  2018-01-08T11:39:38Z
source:         RIPE

person:         Sven Engelhardt
address:        Hugenottenallee 167
address:        63263 Neu-Isenburg
address:        Germany
phone:          +49 6102 8235353
e-mail:         sven.engelhardt@gtt.net
nic-hdl:        SE33-RIPE
remarks:        PGP public key certificate object: PGPKEY-2B682C80
remarks:        Internic: SE585
mnt-by:         AS3257-PERS-MNT
created:        2002-04-29T13:45:28Z
last-modified:  2018-01-08T11:37:27Z
source:         RIPE

person:         Tobias Kuettner
address:        GTT
address:        Hugenottenallee 167
address:        63263 Neu-Isenburg
address:        Germany
phone:          +49 6102 8235381
e-mail:         netguard@gtt.net
e-mail:         tobias.kuettner@gtt.net
nic-hdl:        TK333-RIPE
remarks:        PGP public key certificate object: PGPKEY-369DB26A
remarks:        PGP public key certificate object: PGPKEY-4030ED10
mnt-by:         AS3257-PERS-MNT
created:        2002-04-29T13:41:11Z
last-modified:  2018-01-08T11:36:56Z
source:         RIPE

route:          141.136.96.0/20
descr:          Tinet SpA
origin:         AS3257
mnt-by:         AS3257-ROUTE-MNT
created:        2011-06-30T13:11:45Z
last-modified:  2011-06-30T13:11:45Z
source:         RIPE

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.