AS Number
AS Name
Org Name






AS4783 Looking Glass






IPv6 NUMs(/64)


45,056 IPv4 Addresses
CIDR Description IP Num SYSNET Systex Corporation SYSNET Business Department 4096 SYSNET Systex Corporation SYSNET Business Department 16384 SYSNET Systex Corporation SYSNET Business Department 16384 SYSNET Systex Corporation SYSNET Business Department 4096 TWNIC-TW Taiwan Network Information Center 4096
CIDR Description IP NUMs(prefix /64)
2405:a00::/32 SYSNET Systex Corporation SYSNET Business Department 4294967296
AS Description Country/Region IPv4 NUMs IPv6 NUMs IPv4 IPv6
AS4780 SEEDNET - Digital United Inc., TW Taiwan 1,585,920 279,172,874,240 IPv4 IPv4 IPv6 IPv6
AS9924 TFN-TW - Taiwan Fixed Network, Telco and Network Service Provider., TW Taiwan 2,479,360 146,028,888,064 IPv4 IPv4
IP Address Domain NUMs Domains 1 2 1 1 1 1 1 1
as-block:       AS4608 - AS4865
descr:          APNIC ASN block
remarks:        These AS numbers are further assigned by APNIC
remarks:        to APNIC members and end-users in the APNIC region
admin-c:        HM20-AP
tech-c:         HM20-AP
mnt-by:         APNIC-HM
mnt-lower:      APNIC-HM
last-modified:  2019-05-20T03:52:26Z
source:         APNIC

role:           APNIC Hostmaster
address:        6 Cordelia Street
address:        South Brisbane
address:        QLD 4101
country:        AU
phone:          +61 7 3858 3100
fax-no:         +61 7 3858 3199
e-mail:         [email protected]
admin-c:        AMS11-AP
tech-c:         AH256-AP
nic-hdl:        HM20-AP
remarks:        Administrator for APNIC
notify:         [email protected]
mnt-by:         MAINT-APNIC-AP
last-modified:  2013-10-23T04:06:51Z
source:         APNIC

as-block:       AS4780 - AS4783
descr:          TWNIC-TW-AS-BLOCK
remarks:        These AS numbers are further assigned by TWNIC
remarks:        to TWNIC members
admin-c:        TWA2-AP
tech-c:         TWA2-AP
mnt-by:         APNIC-HM
mnt-lower:      MAINT-TW-TWNIC
last-modified:  2017-06-29T23:47:07Z
source:         APNIC

role:           TWNIC Whois Administrator
address:        Taiwan Network Information Center
address:        3F., No. 123, Sec. 4, Bade Rd., Songshan Dist.,
address:        Taipei, Taiwan, 105
country:        TW
phone:          +886-2-25289696
fax-no:         +886-2-25287756
e-mail:         [email protected]
admin-c:        ck373-AP
tech-c:         TW922-AP
tech-c:         NS10-AP
nic-hdl:        TWA2-AP
notify:         [email protected]
mnt-by:         MAINT-TW-TWNIC
last-modified:  2020-01-02T03:54:20Z
source:         APNIC

aut-num:        AS4783
as-name:        SYSNET-AS1
descr:          SYSTEX CORPORATION
descr:          SYSNET BUSINESS UINT
descr:          Taipei Taiwan R.O.C.
country:        TW
import:         from AS4778
                action pref=101;
                accept ANY
import:         from AS4780
                action pref=102;
                accept ANY
import:         from AS7481
                action pref=103;
                accept ANY
import:         from AS7483
                action pref=104;
                accept ANY
import:         from AS9311
                action pref=105;
                accept ANY
export:         to AS4778
                announce ANY
export:         to AS4780
                announce ANY
export:         to AS7481
                announce ANY
export:         to AS7483
                announce ANY
export:         to AS9311
                announce ANY
default:        to AS4780
                action pref=101;
                networks ANY
admin-c:        JC4-AP
tech-c:         JC4-AP
mnt-by:         MAINT-TW-TWNIC
mnt-irt:        IRT-TWNIC-AP
last-modified:  2015-12-01T22:09:58Z
source:         APNIC

irt:            IRT-TWNIC-AP
address:        Taipei, Taiwan, 100
e-mail:         [email protected]
abuse-mailbox:  [email protected]
admin-c:        TWA2-AP
tech-c:         TWA2-AP
auth:           # Filtered
remarks:        Please note that TWNIC is not an ISP and is not empowered
remarks:        to investigate complaints of network abuse.
mnt-by:         MAINT-TW-TWNIC
last-modified:  2015-10-08T07:58:24Z
source:         APNIC

person:         Jackie Chang
address:        SYSTEX CORPORATION
address:        SYSNET BUSINESS UINT
address:        12F 51, SEC. 2, CHUNG CHING SOUTH RD.,
address:        TAIPEI, TAIWAN, R.O.C.
country:        TW
phone:          +886-2-23569008 Ext.7933
fax-no:         +886-2-23568422
e-mail:         [email protected]
nic-hdl:        JC4-AP
mnt-by:         MAINT-AP-ATNETWORK
last-modified:  2008-09-04T07:29:14Z
source:         APNIC