Reported with real callsigns: every Asiatic Russia contact logged CQ 17
/ ITU 30, whatever the operator's real zone. RU0LL and RA0FF are 19/34,
UA0SDX is 18/32, and QRZ.com had all three right.
Measured before touching anything: cty.dat answers 17/30 for RU0, RA0,
UA0 and UA9 alike — one representative pair for a country eight CQ zones
wide — while ClubLog's prefix table gives 19, 19, 18 and 17. The
reporter's instinct that no UA0 sits in CQ 17 was exactly right.
fillFromDXCC overrode the callbook's zones on purpose, and the reason
holds only for the country: QRZ returns the political nation where
cty.dat returns the DXCC entity. A zone answers a different question —
not what the callsign IS but where the station SITS — and there the
per-station page beats a country default. Zones now FILL rather than
override; the entity is untouched.
The cache made it worse by remembering our conclusion as though the page
had said it, so the wrong zones would have outlived this fix. A lookup
is now cached as the callbook returned it and the country file is
applied on read, which also lets a cty.dat update reach old rows.
