I just had something ship registered mail from Israel to the States; please add so Packagetrackr can pick it up from origin (not just once USPS gets it several days from now).

Per OP's link (verified by my shipping email), domestic tracking numbers are 8 digits only (per website); only international mail uses UPU/EMS format. For international mail originating in Israel, national suffix is IL; prefix is EE for EMS (per website), RR for registered mail (per my own tracking number). Tracking page claims registered-mail info is only in Hebrew, but apparently that's just for incoming; my outgoing item tracked in English. (EMS apparently tracks in English both directions.)