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.

Duncan, OK [Prefix detail]

LATA: 536 OKLAHOMA CITY OK

LIR:

V: 08171 H: 04369

ILEC: 9533 SOUTHWESTERN BELL

Includes all or part of:

NPA 580:

251 252 255 467 470 475 560 605 606 656 736 786 860 943 990

See all [Local Prefixes]

Local calling TO 1 exchange: [Reverse direction]

Rate centrePlan typeCall typeMonthly limit (minutes)NoteEffective date
Velma, OK     

Last updated: Sat, 10 Oct 2026 15:24:20 UTC

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