What is the ZAP range of an Ingress Portal

The range within which a portal may counter attack appears to be twice of your hacking radius, i.e. around 70m. I have read of attacking high level portals standing just outside range to avoid XM depletion, esp. for high level farms.

Note that firing bursters from afar also means their damage is greatly reduced and you will need many more of them. However, since the actual firing of an XMP uses far less XM than the portal zap, this is a means to take down high level portals that would otherwise suck all XM from the scanner.

I realise this question is now [almost] five years old, but I found it because I needed the same info, others may do likewise, so I believe it is worth adding that the latest version (0.1.4.20170430.123533) of the IITC ZapRange Plugin calculates a portal's zap range as:

var range = (5*portalLevel)+35;

Hence:

Portal Level         Zap Range
1                    40m
2                    45m
3                    50m
4                    55m
5                    60m
6                    65m
7                    70m
8                    85m