203.107.72.0/21
Nobody announces 203.107.72.0/21 on its own, and no announced prefix covers it. Seen by 0 of our 5 looking glass sessions.
Summary
What the table says about 203.107.72.0/21
Prefix
Origin
not announced
Size
2,048 addresses
Less specific
none
More specifics
8
IRR route objects
2 exact, 11 covering
RPKI
Route origin authorizations
| ROA prefix | Max length | Authorized origin | Trust anchor |
|---|---|---|---|
| 203.107.0.0/17 | /24 | AS37963 ALIBABA-CN-NET | APNIC |
| 203.107.0.0/17 | /24 | AS45102 ALIBABA-CN-NET | APNIC |
| 203.107.0.0/17 | /24 | AS134963 ASEPL-AS-AP | 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 |
|---|---|---|---|---|
| 203.107.72.0/21 | AS37963 ALIBABA-CN-NET | APNIC | Alibaba (US) Technology Co., Ltd. | MAINT-CNNIC-AP |
| 203.107.72.0/21 | AS45102 ALIBABA-CN-NET | APNIC | Alibaba (US) Technology Co., Ltd. | MAINT-CNNIC-AP |
| 203.107.64.0/20 covering | AS37963 ALIBABA-CN-NET | APNIC | Alibaba (US) Technology Co., Ltd. | MAINT-CNNIC-AP |
| 203.107.64.0/20 covering | AS45102 ALIBABA-CN-NET | APNIC | Alibaba (US) Technology Co., Ltd. | MAINT-CNNIC-AP |
| 203.107.64.0/19 covering | AS37963 ALIBABA-CN-NET | APNIC | Alibaba (US) Technology Co., Ltd. | MAINT-CNNIC-AP |
| 203.107.64.0/19 covering | AS45102 ALIBABA-CN-NET | APNIC | Alibaba (US) Technology Co., Ltd. | MAINT-CNNIC-AP |
| 203.107.64.0/19 covering | AS9505 TWGATE-AP | REACH | REACH (Customer Route) | MAINT-REACH-NOC |
| 203.107.64.0/18 covering | AS37963 ALIBABA-CN-NET | APNIC | Alibaba (US) Technology Co., Ltd. | MAINT-CNNIC-AP |
| 203.107.64.0/18 covering | AS45102 ALIBABA-CN-NET | APNIC | Alibaba (US) Technology Co., Ltd. | MAINT-CNNIC-AP |
| 203.107.0.0/17 covering | AS37963 ALIBABA-CN-NET | APNIC | Hangzhou Alibaba Advertising Co.,Ltd. | MAINT-CNNIC-AP |
| 203.107.0.0/17 covering | AS45102 ALIBABA-CN-NET | APNIC | Alibaba (US) Technology Co., Ltd. | MAINT-CNNIC-AP |
| 203.107.0.0/17 covering | AS45102 ALIBABA-CN-NET | NTTCOM | CMI IP Transit | MAINT-CMI-INT-HK |
| 203.107.0.0/17 covering | AS45102 ALIBABA-CN-NET | RADB | CMI (Customer Route) | MAINT-AS58453 |
More specific
Prefixes inside 203.107.72.0/21
8 announced prefixes fall inside this one.
Show the 8 prefixes
203.107.72.0/24 AS37963 ALIBABA-CN-NET203.107.73.0/24 AS37963 ALIBABA-CN-NET203.107.74.0/24 AS37963 ALIBABA-CN-NET203.107.75.0/24 AS37963 ALIBABA-CN-NET203.107.76.0/24 AS37963 ALIBABA-CN-NET203.107.77.0/24 AS37963 ALIBABA-CN-NET203.107.78.0/24 AS37963 ALIBABA-CN-NET203.107.79.0/24 AS37963 ALIBABA-CN-NET