AS Name
UTnet
Org Name
The University of Tokyo
Registry Region
Japan
Looking Glass
IPv4Prefixes

7

IPv6Prefixes

1

IPv4 NUMs

200,704

IPv6 NUMs(/64)

65,536

200,704 IPv4 Addresses
CIDR Description IP Num
130.69.0.0/24 UTNET University of Tokyo 256
130.69.0.0/16 UTNET University of Tokyo 65536
133.11.0.0/24 JPNIC-NET-JP-ERX Japan Network Information Center 256
133.11.0.0/16 JPNIC-NET-JP-ERX Japan Network Information Center 65536
157.82.0.0/24 UTNET University of Tokyo 256
157.82.0.0/16 UTNET University of Tokyo 65536
192.51.208.0/20 UTNET University of Tokyo 4096
CIDR Description IP NUMs(prefix /64)
2404:d540:1::/48 HGC1-JPNIC-JP-20190507 Japan Network Information Center 65536
AS Description Country/Region IPv4 NUMs IPv6 NUMs IPv4 IPv6
AS2500 WIDE-BB - WIDE Project, JP Japan 262,656 4,294,967,296 IPv4 IPv4
AS2907 JPNIC-2Byte-ASBLOCK-AP - for assignment to JPNIC members, JP Japan 8,935,488 8,589,934,592 IPv4 IPv4 IPv6 IPv6
as-block:       AS2497 - AS2528
descr:          JPNIC-2Byte-ASBLOCK-AP
descr:          for assignment to JPNIC members
country:        JP
admin-c:        JNIC1-AP
tech-c:         JNIC1-AP
remarks:        Authoritative information regarding AS Number
remarks:        assignments made from within this block can be
remarks:        queried at whois.nic.ad.jp.
remarks:        To only display English output,
remarks:        add '/e' at the end of command,
remarks:        e.g. 'whois -h whois.nic.ad.jp xxx/e'.
mnt-by:         APNIC-HM
mnt-lower:      MAINT-JPNIC
last-modified:  2017-06-12T03:54:29Z
source:         APNIC

role:           Japan Network Information Center
address:        Urbannet-Kanda Bldg 4F
address:        3-6-2 Uchi-Kanda
address:        Chiyoda-ku, Tokyo 101-0047,Japan
country:        JP
phone:          +81-3-5297-2311
fax-no:         +81-3-5297-2312
e-mail:         [email protected]
admin-c:        JI13-AP
tech-c:         JE53-AP
nic-hdl:        JNIC1-AP
mnt-by:         MAINT-JPNIC
last-modified:  2012-08-28T07:58:02Z
source:         APNIC


aut-num:        AS2501
as-name:        UTnet
descr:          The University of Tokyo
import:         from AS2500 100 accept ANY
import:         from AS2907 100 accept ANY
export:         to AS2500 announce AS2501
export:         to AS2907 announce AS2501
country:        JP
admin-c:        MN010JP
tech-c:         MN010JP
tech-c:         YS7474JP
last-modified:  2014-03-19T00:59:42Z
source:         JPNIC