61.57.136.0/21 Extra-Lan Technologies Co., LTD
Announced by AS18429 Extra-Lan Technologies Co., LTD. RPKI valid Seen by 5 of our 5 looking glass sessions.
Summary
What the table says about 61.57.136.0/21
Prefix
Origin
AS18429 EXTRALAN-TW
RPKI
RPKI valid
Size
2,048 addresses
Less specific
none
More specifics
2
IRR route objects
2 exact, 9 covering
In RouteViews
2026-10-12 20:02 UTC
Paths
How 61.57.136.0/21 is reached
Every path our looking glass collectors hold for this exact prefix. Open one for its attributes, or see them all side by side in the looking glass.
AS36601 TNT (TNT - Tampa, FL)Collector-1-TAMPA-FL36601 174 9505 9924 18429
| Origin | AS18429 Extra-Lan Technologies Co., LTD |
| Origin code | IGP |
| Communities | 174:21001 174:22013 36601:150 36601:174 36601:2001 |
| Updated | 4d 18h ago |
AS903 UNIFIED-COMMUNICATIONS-TECHNOLOGIES (UCT - Valdosta, GA)Collector-2-COCOA-FL903 13760 7029 15412 9924 18429
| Origin | AS18429 Extra-Lan Technologies Co., LTD |
| Origin code | IGP |
| Communities | 903:900 903:13760 |
| Updated | 5d 2h ago |
AS36295 FLORIDA-HIGH-SPEED-INTERNET (FLHSI - Cocoa, FL)Collector-2-COCOA-FL36295 6939 15412 9924 18429
| Origin | AS18429 Extra-Lan Technologies Co., LTD |
| Origin code | IGP |
| Communities | 36295:100 |
| Updated | 5d 2h ago |
RPKI
Route origin authorizations
Covered by a ROA authorizing AS18429 to originate 61.57.136.0/21 up to /23. Validate another origin.
| ROA prefix | Max length | Authorized origin | Trust anchor |
|---|---|---|---|
| 61.57.136.0/21 | /23 | AS18429 EXTRALAN-TW | APNIC |
| 61.57.128.0/20 | /24 | AS18429 EXTRALAN-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 |
|---|---|---|---|---|
| 61.57.136.0/21 | AS18429 EXTRALAN-TW | NTTCOM | Proxy-registered route object | MAINT-AS9924 |
| 61.57.136.0/21 | AS18429 EXTRALAN-TW | RADB | Proxy-registered route object | MAINT-AS9924 |
| 61.57.128.0/20 covering | AS18429 EXTRALAN-TW | NTTCOM | Taiwan Fixed Network | MAINT-AS9924 |
| 61.57.128.0/20 covering | AS17709 APT | REACH | REACH (Customer Route) | MAINT-REACH-NOC |
| 61.57.128.0/19 covering | AS4780 SEEDNET | RADB | SeedNet (Customer Route, Taiwan Broadband Communications,. Ltd) | MAINT-AS4780 |
| 61.57.128.0/19 covering | AS9924 TFN-TW | RADB | Proxy Announcement | MAINT-AS9924 |
| 61.57.128.0/19 covering | AS18429 EXTRALAN-TW | RADB | SeedNet Proxy-registered route object (Customer Route: Extra-Lan Technologies Co, LTD.) | MAINT-AS4780 |
| 61.57.128.0/19 covering | AS131596 TBCOM-NET | RADB | Far Eastone Telecommunications Co., Ltd | MAINT-AS4780 |
| 61.57.128.0/18 covering | AS4780 SEEDNET | RADB | SeedNet (Customer Route, Taiwan Broadband Communications,. Ltd) | MAINT-AS4780 |
| 61.57.128.0/18 covering | AS131596 TBCOM-NET | RADB | Far Eastone Telecommunications Co., Ltd | MAINT-AS4780 |
| 61.57.0.0/16 covering | AS9505 TWGATE-AP | REACH | REACH (Customer Route) | MAINT-REACH-NOC |
More specific
Prefixes inside 61.57.136.0/21
2 announced prefixes fall inside this one.