NTS traffic is addressed very simply:@NTS. So if I was going to send an NTS message to the ARRL I would use 06111@NTSCT. Simple, right? And I'm assuming that most BBSs would allow you to route traffic based on the @NTSportion of the address but not FBB. FBB routes traffic based on the zipcode *only*. While this does allow a more fine tuning this also means that your forward.sys file will be quite long for routing NTS traffic all over the US and Canada and you'll also have to figure out the zip code schema. Not to worry as I've already done that last part for you. Below is the complete list of zip codes per state. Simply copy and paste which zip codes a forwarding BBS will handle into their portion of the forward.sys file and off you go.
Z NTSAL Z 35* Z 36* Z NTSAK Z 99* Z NTSAZ Z 85* Z 86* Z NTSAR Z 71* Z 72* Z NTSCA Z 90* Z 91* Z 92* Z 93* Z 94* Z 95* Z 96* Z NTSCO Z 80* Z 81* Z NTSCT Z 06* Z NTSDE Z 197* Z 198* Z 199* Z NTSDC Z 20* Z NTSFL Z 32* Z 33* Z 34* Z NTSGA Z 30* Z 31* Z 39901 Z NTSHI Z 96* Z NTSID Z 83* Z NTSIL Z 60* Z 61* Z 62* Z NTSIN Z 46* Z 47* Z NTSIA Z 50* Z 51* Z 52* Z NTSKS Z 66* Z 67* Z NTSKY Z 40* Z 41* Z 42* Z NTSLA Z 70* Z 71* Z NTSME Z 039* Z 04* Z NTSMD Z 20* Z 21* Z NTSMA Z 01* Z 02* Z 05501 Z 05544 Z NTSMI Z 48* Z 49* Z NTSMN Z 55* Z 56* Z NTSMS Z 386* Z 387* Z 388* Z 389* Z 39* Z NTSMO Z 63* Z 64* Z 65* Z NTSMT Z 59* Z NTSNE Z 68* Z 69* Z NTSNV Z 88901 Z 88905 Z 89* Z NTSNH Z 03* Z NTSNJ Z 07* Z 08* Z NTSNM Z 87* Z 88* Z NTSNY Z 06390 Z 10* Z 11* Z 12* Z 13* Z 14* Z NTSNC Z 27* Z 28* Z NTSND Z 58* Z NTSOH Z 43* Z 44* Z 45* Z NTSOK Z 73* Z 74* Z NTSOR Z 97* Z NTSPA Z 15* Z 16* Z 17* Z 18* Z 19* Z NTSRI Z 028* Z 029* Z NTSSC Z 29* Z NTSSD Z 57* Z NTSTN Z 37* Z 38* Z NTSTX Z 73301 Z 73344 Z 75* Z 76* Z 77* Z 78* Z 79* Z 885* Z NTSUT Z 84* Z NTSVT Z 05* Z NTSVA Z 201* Z 22* Z 23* Z 24* Z NTSWA Z 98* Z 99* Z NTSWV Z 247* Z 248* Z 249* Z 25* Z 26* Z NTSWI Z 53* Z 54* Z NTSWY Z 82* Z 830* Z 831* # CANADIAN PROVINCES Z A* Z B* Z C* Z E* Z G* Z H* Z J* Z K* Z L* Z M* Z N* Z P* Z R* Z S* Z T* Z V* Z X* Z Y*