The NG-RP ban system is dumb and outdated.
The ban will issue a ban to the account and to the IP, only ever will your range be banned when a box admin (Usually head admin/lead head admin above) logs manually on and adds you to their filter. (not often)
Swap your IP by either using a dynamic method or a VPN, once done swap your account name and register again.
I'm here for any PAWN/SA-MP questions, PM me.