123.51.250.0/24 RPKI valid MOAS

Announced by 2 different origins, which is either a deliberate multi-origin setup or a hijack.

This prefix is announced by more than one AS. Compare how many collector peers see each origin below: a hijack is usually visible as a second origin seen by far fewer peers than the legitimate one.

Origins

Origin ASRPKI Peers seeing itSample path First seenLast seen
AS4780 Digital United Inc. RPKI valid 42 3454929144780 2026-10-18 2026-10-22
AS9919 New Century InfoComm Tech Co., Ltd. RPKI valid 1 213241900247809919 2026-09-18 2026-10-22

RPKI

2 ROAs cover this prefix

ROA prefixMax lengthAuthorised originTrust anchorResult for this route
123.51.128.0/17 /24 AS4780 apnic authorises it
123.51.128.0/17 /24 AS9919 apnic wrong origin

Registry

Who this address space is delegated to, regardless of whether it is routed

Delegated block
123.51.128.0/17
RIR
APNIC
Country
🇹🇼 TW
Status
allocated
Allocated
2008-11-20

Less specific routes

Announced prefixes that contain this one

Prefix Origin RPKI Peers Sample path First seen
123.51.224.0/19 v4 AS9919 New Century InfoComm Tech Co., Ltd. RPKI valid 43 2448247809919 2026-09-18
123.51.192.0/18 v4 AS9919 New Century InfoComm Tech Co., Ltd. RPKI valid 43 2448247809919 2026-09-18
123.51.128.0/17 v4 AS9919 New Century InfoComm Tech Co., Ltd. RPKI valid 43 2448247809919 2026-09-18

More specific routes

0 announced prefixes inside this one

Nothing more specific is announced.

Recorded changes

WhenChangeOriginPath
2026-10-17 18:12:24Z origin change AS9919 → AS4780 4967320485900290024780