Two codes, one city, and a state line either side of it
In most large American cities the area code was split, then split again, until the
map underneath the digits stopped resembling anything. Washington did none of that
and one other thing instead. 202 was drawn around the city and never divided, and
when it began running short of numbers, 771 was laid straight over the top of it in
April 2021 rather than carved out of it. Both codes serve every part of the city and
nothing outside it, so the edge of the numbering is still the edge it always was.
What makes that worth a paragraph is what sits on the other side of it. Cross the
boundary and you are not in the next county, you are in another state, with its own
licensing, its own tax authority and its own area codes that this page is not going
to guess at. Plenty of American cities sit against a state line. This one is ringed
by two of them, so the code changes and the state changes together at every kerb on
the edge of the city rather than along one road through the middle of it.
Inside the line, though, the overlay quietly changed what the digits can tell
anybody. Two businesses on the same street can now hold different codes, because
whether you got 202 or 771 came down to when you asked for the number rather than
where you were standing when you asked. So the code here says roughly when a line was
ordered, not where it lives. A caller who reads anything into that is reading the
wrong thing, and the everyday consequence is the one you already live with, that
every call placed in this city needs all ten digits, even the one to the unit next
door.
So a Washington code is a strong claim and a narrow one, whichever of the two you
hold. Either says the city proper, which is precisely the signal a national member
body or a firm whose work is with the federal government wants on its letterhead.
Neither says anything at all about the two states most of the region sleeps in, which
is where a trade that drives to houses does half its work. The digits settle your
address and leave the useful question open.
Which puts the weight on the greeting rather than the number. Say in the first
sentence whether you cross the line, and which side you hold a licence on. That is
ordinary auto attendant behaviour, and it takes the
question off the front of every single call.