157.88.0.0/16

inetnum:        157.88.0.0 - 157.88.255.255
netname:        UVA
descr:          Universidad de Valladolid
descr:          Valladolid
country:        ES
admin-c:        FMP31-RIPE
tech-c:         FMP31-RIPE
abuse-c:        RIAC2-RIPE
tech-c:         UVA1
status:         LEGACY
remarks:        mail spam reports: abuse@rediris.es
remarks:        security incidents: cert@rediris.es
notify:         noc@uva.es
notify:         iris-nic@rediris.es
mnt-by:         UVA-NMC
mnt-by:         REDIRIS-NMC
created:        1970-01-01T00:00:00Z
last-modified:  2019-12-04T13:08:56Z
source:         RIPE
abuse-email:    iris@certsi.es
abuse-c:        RIAC2-RIPE
abuse-org:      ORG-IANA1-RIPE

role:           UVA Network Operation Center
address:        Area de Redes y Comunicaciones
address:        Servicio de las Telecomunicaciones e Informatica
address:        Edificio Alfonso VIII
address:        Real de Burgos s/n
address:        E-47011 Valladolid
address:        SPAIN
e-mail:         noc@uva.es
tech-c:         ABA1
tech-c:         JAG1
admin-c:        FMP31-RIPE
tech-c:         FMP31-RIPE
nic-hdl:        UVA1
mnt-by:         UVA-NMC
created:        2004-05-11T11:57:45Z
last-modified:  2004-05-12T07:45:44Z
source:         RIPE

person:         Fernando Martin Pelayo
address:        Edificio Alfonso VIII
address:        Real de Burgos, s/n
address:        E-47002 Valladolid
address:        SPAIN
phone:          +34 983423594
fax-no:         +34 983423271
e-mail:         fernando@uva.es
nic-hdl:        FMP31-RIPE
notify:         noc@uva.es
notify:         iris-nic@rediris.es
mnt-by:         UVA-NMC
mnt-by:         REDIRIS-NMC
created:        1970-01-01T00:00:00Z
last-modified:  2017-10-30T21:45:04Z
source:         RIPE

route:          157.88.0.0/16
descr:          UVA
origin:         AS766
mnt-by:         REDIRIS-NMC
created:        1970-01-01T00:00:00Z
last-modified:  2012-03-12T08:09:35Z
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.