AS Number
AS209300
AS Name
TWD2-NET
Org Name
Wende Tan
Country
China
Registry

ripe

RegDate

Updated

2026-02-12T14:40:05Z

AS209300 Looking Glass
IPv4Prefixes

1

IPv6Prefixes

6

IPv4 NUMs

256

IPv6 NUMs(/64)

4,296,146,944

256 IPv4 Addresses
CIDR Description IP Num
44.30.120.0/24
IRR InValid
Amateur Radio Digital Communications 256
CIDR Description IP NUMs(prefix /64)
2404:f4c0:f000::/44
IRR InValid
TWD2-NET TWD2 Education and Research Network 1048576
2404:f4c0:f001::/48
IRR Valid
TWD2-NET TWD2 Education and Research Network 65536
2404:f4c0:f002::/48
IRR Valid
TWD2-NET TWD2 Education and Research Network 65536
2a05:1085::/32
ROA Signed and Valid IRR Valid
Wende Tan 4294967296
2a0c:b641:570::/48
ROA Signed and Valid IRR Parent Valid
TWD2-NET-1 65536
2a0c:b641:573::/48
ROA Signed and Valid IRR Parent Valid
TWD2-NET-4 65536
AS Description Country/Region IPv4 NUMs IPv6 NUMs IPv4 IPv6
AS29632 NASSIST-AS - Netassist International EOOD, BG Bulgaria 14,592 262,144 IPv6 IPv6
AS38255 FITI-AS-AP - China Education and Research Network (CERNET), CN China 2,048 4,296,081,408 IPv6 IPv6
AS45576 CERNET2-TSINGHUA6-AS-AP - Tsinghua University, CN China 0 4,295,098,368 IPv6 IPv6
AS142650 China Education and Research Network (CERNET), CN China 0 4,294,967,296 IPv6 IPv6
AS212683 OLILO-AS - Olilo UK & Ireland Ltd, GB United Kingdom 2,816 8,589,934,592 IPv4 IPv4 IPv6 IPv6
AS8772 NLineLLC - NetAssist LLC, UA Ukraine 15,104 1,030,794,379,264 IPv6 IPv6
AS20473 AS-VULTR - The Constant Company, LLC, US United States 1,463,296 455,562,100,736 IPv6 IPv6
AS Description Country/Region IPv4 NUMs IPv6 NUMs IPv4 IPv6
AS38255 FITI-AS-AP - China Education and Research Network (CERNET), CN China 2,048 4,296,081,408 IPv6 IPv6
AS24239 TWD2-NET-AS-AP - TWD2 Education and Research Network, CN China 0 2,162,688 IPv6 IPv6

Peers at this Exchange Point

Country/Region IX IPv4 IPv6 Port Speed Updated
United States EVIX - Experimental Virtual Internet Exchange 206.81.104.145 2602:fed2:fff:ffff::145 100 Mbps 2026-03-26 17:49:35
Switzerland 4b42 Internet Exchange Point - 4b42 Internet Exchange Point 100 Mbps 2024-04-24 17:44:37

Private Peering Facilities

Country/Region Name City Website Updated
as-block:       AS208189 - AS214345
descr:          RIPE NCC ASN block
remarks:        These AS Numbers are assigned to network operators in the RIPE NCC service region.
mnt-by:         RIPE-NCC-HM-MNT
created:        2026-02-12T14:40:05Z
last-modified:  2026-02-12T14:40:05Z
source:         RIPE



aut-num:        AS209300
as-name:        TWD2-NET
descr:          TWD2 Education and Research Network
descr:          London, United Kingdom
org:            ORG-WT43-RIPE
import:         from AS6939 accept ANY
export:         to AS6939 announce AS209300:AS-CUSTOMERS
import:         from AS20473 accept ANY
export:         to AS20473 announce AS209300:AS-CUSTOMERS
import:         from AS212683 accept ANY
export:         to AS212683 announce AS209300:AS-CUSTOMERS
import:         from AS4842 accept ANY
export:         to AS4842 announce AS209300:AS-CUSTOMERS
import:         from AS209306 accept AS209306
export:         to AS209306 announce AS209300:AS-CUSTOMERS
import:         from AS24239 accept ANY
export:         to AS24239 announce ANY
mp-import:      afi ipv6.unicast from AS29632 accept ANY
mp-export:      afi ipv6.unicast to AS29632 announce AS209300:AS-CUSTOMERS
admin-c:        WTNN1-RIPE
tech-c:         WTNN1-RIPE
abuse-c:        WTNN1-RIPE
status:         ASSIGNED
mnt-by:         RIPE-NCC-END-MNT
mnt-by:         twd2-mnt
created:        2019-03-01T12:14:34Z
last-modified:  2026-04-30T17:20:55Z
source:         RIPE
sponsoring-org: ORG-CR158-RIPE

organisation:   ORG-WT43-RIPE
org-name:       Wende Tan
country:        CN
reg-nr:         Not Applicable
org-type:       OTHER
address:        Department of Computing
address:        Imperial College London
address:        Huxley Building
address:        180 Queen's Gate, London, SW7 2RH
address:        UNITED KINGDOM
e-mail:         twd2.me@gmail.com
e-mail:         twd2@163.com
abuse-c:        WTNN1-RIPE
admin-c:        WTNN1-RIPE
tech-c:         WTNN1-RIPE
mnt-ref:        twd2-mnt
mnt-by:         twd2-mnt
created:        2019-02-23T16:24:54Z
last-modified:  2026-05-13T05:33:31Z
source:         RIPE

role:           TWD2 Education and Research Network NOC
address:        Department of Computing
address:        Imperial College London
address:        Huxley Building
address:        180 Queen's Gate, London, SW7 2RH
address:        UNITED KINGDOM
e-mail:         twd2.me@gmail.com
e-mail:         twd2@163.com
nic-hdl:        WTNN1-RIPE
abuse-mailbox:  twd2.me+abuse@gmail.com
mnt-by:         twd2-mnt
created:        2019-02-23T16:18:42Z
last-modified:  2025-04-14T20:50:58Z
source:         RIPE