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.

Isabel, SD [Prefix detail]

LATA: 640 SOUTH DAKOTA

LIR:

V: 06162 H: 05728

ILEC: 1647 CHEYENNE RIVER SIOUX TRIBAL TEL. AUTHORITY

NPA 605:

466

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Last updated: Sat, 04 Jul 2026 13:07:56 UTC

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