Local Calling Guide

Rate centre information

Search by rate centre (exchange) name, region, area code, LATA. Enter full or partial name. Use official postal abbreviations for province/state/territory.

West Spearfish, WY [Prefix detail]

LATA: 640 SOUTH DAKOTA

LIR:

V: 06474 H: 06056

ILEC: 9631 QWEST CORPORATION

Includes all or part of:

NPA 307:

312 407 446 643

See all [Local Prefixes]

Local calling TO 1 exchange: [Reverse direction]

Rate centrePlan typeCall typeMonthly limit (minutes)NoteEffective date
Spearfish, SD     

Last updated: Tue, 29 Sep 2026 03:00:13 UTC

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