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: 346 [Rate centres in NPA 346] [Dial plan for NPA 346]

NXX: 370

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
346-370 A Spring TX HSTDTXBG9MD  6701 AERIAL COMMUNICATIONS 560      
346-370 0 Spring TX HSTDTXBG9MD  6701 AERIAL COMMUNICATIONS 560   2018-12-09   
346-370 1 Spring TX HSTDTXBG9MD  6701 AERIAL COMMUNICATIONS 560   2018-12-09   
346-370 2 Spring TX HSTDTXBG9MD  6701 AERIAL COMMUNICATIONS 560   2018-12-09   
346-370 3 Spring TX HSTDTXBG9MD  6701 AERIAL COMMUNICATIONS 560   2018-12-09   
346-370 4 Spring TX HSTDTXBG9MD  6701 AERIAL COMMUNICATIONS 560   2018-12-09   
346-370 5 Spring TX HSTDTXBG9MD  6701 AERIAL COMMUNICATIONS 560   2019-01-11   
346-370 6 Spring TX HSTDTXBG9MD  6701 AERIAL COMMUNICATIONS 560   2019-01-11   
346-370 7 Spring TX HSTDTXBG9MD  6701 AERIAL COMMUNICATIONS 560   2019-01-11   
346-370 8 Spring TX HSTDTXBG9MD  6701 AERIAL COMMUNICATIONS 560   2019-01-11   
346-370 9 Spring TX HSTDTXBG9MD  6701 AERIAL COMMUNICATIONS 560   2018-12-09   

Last updated: Tue, 04 May 2021 15:04:27 UTC

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