Until fairly recently, it was easy to find a block of 10 or so DIDs
in area code 510 (Oakland, CA) on VOIP.MS's "Order DID(s)" page.
I often saw hundreds of 510 DIDs available.
Currently, VOIP.MS and Twilio and Anveo have quite low inventory
of 510 numbers. Anveo shows none in 510, despite having about
50 in area code 415 (San Francisco), which is typically a much
tighter DID pool.
Can any of you explain the tight supply for 510 DIDs?
And can any of you point me to a provider that might have a block
of 10 (roughly consecutive) DIDs in area code 510?
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