123.51.128.0/20
Nobody announces 123.51.128.0/20 on its own; it is covered by 123.51.128.0/19 AS9919 NCIC-TW. Seen by 0 of our 5 looking glass sessions.
Summary
What the table says about 123.51.128.0/20
Prefix
Origin
not announced
Size
4,096 addresses
Less specific
More specifics
13
IRR route objects
2 exact, 6 covering
RPKI
Route origin authorizations
| ROA prefix | Max length | Authorized origin | Trust anchor |
|---|---|---|---|
| 123.51.128.0/17 | /24 | AS4780 SEEDNET | APNIC |
| 123.51.128.0/17 | /24 | AS9919 NCIC-TW | APNIC |
IRR
Route objects
Registered in the IRR for this prefix and the ones covering it. Look it up live.
| Route | Origin | Source | Description | Maintained by |
|---|---|---|---|---|
| 123.51.128.0/20 | AS4780 SEEDNET | RADB | New Century InfoComm Tech Co., Ltd. Far Eastone Telecommunications Co., Ltd. No. 220, Gangchi Rd., Taipei 114 Taiwan | MAINT-AS4780 |
| 123.51.128.0/20 | AS9919 NCIC-TW | RADB | NCIC route object | MAINT-AS4780 |
| 123.51.128.0/19 covering | AS4780 SEEDNET | RADB | New Century InfoComm Tech Co., Ltd. Far Eastone Telecommunications Co., Ltd. No. 220, Gangchi Rd., Taipei 114 Taiwan | MAINT-AS4780 |
| 123.51.128.0/19 covering | AS9919 NCIC-TW | RADB | PACNET (proxy-registered route object) | MAINT-AS4637 |
| 123.51.128.0/18 covering | AS4780 SEEDNET | RADB | New Century InfoComm Tech Co., Ltd. Far Eastone Telecommunications Co., Ltd. No. 220, Gangchi Rd., Taipei 114 Taiwan | MAINT-AS4780 |
| 123.51.128.0/18 covering | AS9919 NCIC-TW | RADB | PACNET (proxy-registered route object) | MAINT-AS4637 |
| 123.51.128.0/17 covering | AS4780 SEEDNET | RADB | New Century InfoComm Tech Co., Ltd. Far Eastone Telecommunications Co., Ltd. No. 220, Gangchi Rd., Taipei 114 Taiwan | MAINT-AS4780 |
| 123.51.128.0/17 covering | AS9919 NCIC-TW | RADB | New Century InfoComm Tech Co., Ltd. | MAINT-AS9919 |
Less specific
Covering prefixes
Announced prefixes that contain this one, most specific first.
More specific
Prefixes inside 123.51.128.0/20
13 announced prefixes fall inside this one.
Show the 13 prefixes
123.51.128.0/24 AS9919 NCIC-TW123.51.129.0/24 AS4780 SEEDNET123.51.130.0/24 AS4780 SEEDNET123.51.131.0/24 AS4780 SEEDNET123.51.132.0/24 AS4780 SEEDNET123.51.133.0/24 AS4780 SEEDNET123.51.134.0/24 AS4780 SEEDNET123.51.135.0/24 AS9919 NCIC-TW123.51.136.0/24 AS9919 NCIC-TW123.51.140.0/24 AS9919 NCIC-TW123.51.141.0/24 AS9919 NCIC-TW123.51.142.0/24 AS9919 NCIC-TW123.51.143.0/24 AS4780 SEEDNET