Local Calling Guide
Area code/prefix search
Keystone, SD
NPA-NXX | BLOCK | Switch | OCN | LATA | LIR | Eff date | Disc date |
---|---|---|---|---|---|---|---|
605-666 | A | KYSTSDXADS1 | 1660 FORT RANDALL TELCO DBA MT RUSHMORE TELEPHONE CO | 640 |
Last updated: Fri, 01 Jul 2022 02:53:40 UTC
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