Routing & BGPLOCALRuns in your browser
ASN Formatter
Convert 32-bit autonomous system numbers between AS-prefixed, asplain, asdot, and asdot+ notation.
This tool handles input and primary processing in your browser and is designed not to send the input to QuickKit’s server.
Representations
| asplain | — |
|---|---|
| asdot | — |
| asdot+ | — |
| AS-prefixed | — |
| Decimal value | — |
| High 16 bits | — |
| Low 16 bits | — |
| Range classification | — |
How it works
Accepts AS-prefixed asplain (AS65551), bare asplain (65551), or asdot (1.15). ASN values are unsigned 32-bit numbers from 0 through 4294967295. asdot renders 16-bit values as one decimal number and larger values as high.low; asdot+ always renders both 16-bit words. Classification is arithmetic only and does not identify the ASN holder or current allocation state.