Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
  • Effective date searches are available only for US area codes. Our sources for non-US NPA-NXX data do not provide this information.
  • If you want to search an entire area code regardless of activity, leave both the next and past days fields set to zero.

NPA: 918 [Rate centres in NPA 918] [Dial plan for NPA 918]

NXX: 544

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
918-544 A Miami OK MIAMOKMADS0  9533 SOUTHWESTERN BELL 538      
918-544 2 Miami OK TULTOKCL8MD  5257 LEVEL 3 COMMUNICATIONS, LLC - OK 538   2012-07-15   
918-544 3 Miami OK TULSOKTBDS7  384H PEERLESS NETWORK OF OKLAHOMA, LLC - OK 538   2021-06-14   
918-544 4 Miami OK TULSOKTBXGY  829J PAETEC ITEL, LLC 538   2016-08-20   
918-544 5 Miami OK TULTOKCL8MD  5257 LEVEL 3 COMMUNICATIONS, LLC - OK 538   2012-01-28   
918-544 6 Miami OK TULTOKCL8MD  5257 LEVEL 3 COMMUNICATIONS, LLC - OK 538   2012-01-28   
918-544 7 Miami OK MIAMOKMADS0  9533 SOUTHWESTERN BELL 538      
918-544 8 Miami OK TLSAOKSMBMD  516C AT&T CORP. 538   2011-11-17   
918-544 9 Miami OK VINTOK20DS0  945H NORTHEAST RURAL SERVICES, INC. - OK 538   2014-09-27   

Last updated: Wed, 04 Mar 2026 03:00:52 UTC

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.