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.

OCN: 903C ONVOY, LLC - TX

<< 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 >>

NPA-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
346-586 7 Houston TX   560   2022-11-08   
346-586 8 Houston TX   560   2022-11-08   
346-588 7 Cypress TX   560   2021-10-25   
346-589 5 Spring TX   560   2022-12-11   
346-589 6 Spring TX   560   2022-12-11   
346-589 7 Spring TX   560   2022-12-11   
346-589 8 Spring TX   560   2023-01-15   
346-590 1 Westfield TX   560   2022-12-15   
346-590 2 Westfield TX   560   2022-12-15   
346-590 3 Westfield TX   560   2023-06-19   
346-590 5 Westfield TX   560   2023-05-13   
346-590 6 Westfield TX   560   2023-08-12   
346-590 7 Westfield TX   560   2023-06-19   
346-590 8 Westfield TX   560   2023-06-19   
346-591 0 Porter Heights TX   560   2023-08-07   
346-591 2 Porter Heights TX   560   2025-07-19   
346-591 3 Porter Heights TX   560   2025-09-27   
346-591 4 Porter Heights TX   560   2026-01-10   
346-591 8 Porter Heights TX   560   2023-10-14   
346-591 9 Porter Heights TX   560   2025-04-12   
346-594 0 Barker TX   560   2023-07-15   
346-594 5 Barker TX   560   2023-05-13   
346-594 6 Barker TX   560   2023-10-01   
346-594 7 Barker TX   560   2023-05-13   
346-594 8 Barker TX   560   2023-03-06   
346-594 9 Barker TX   560   2023-07-15   
346-595 2 Arcola TX   560   2023-05-27   
346-595 3 Arcola TX   560   2023-07-15   
346-595 4 Arcola TX   560   2023-10-14   
346-595 8 Arcola TX   560   2023-08-26   
346-597 1 Langham Creek TX   560   2022-12-17   
346-597 2 Langham Creek TX   560   2022-12-17   
346-597 3 Langham Creek TX   560   2022-12-17   
346-597 4 Langham Creek TX   560   2022-12-17   
346-597 5 Langham Creek TX   560   2022-12-17   
346-597 7 Langham Creek TX   560   2022-12-17   
346-597 8 Langham Creek TX   560   2022-12-17   
346-597 9 Langham Creek TX   560   2022-12-17   
346-598 1 Tomball TX   560   2022-12-17   
346-598 2 Tomball TX   560   2022-12-17   
346-598 3 Tomball TX   560   2022-12-17   
346-598 4 Tomball TX   560   2022-12-17   
346-598 5 Tomball TX   560   2022-12-17   
346-598 6 Tomball TX   560   2022-12-17   
346-598 7 Tomball TX   560   2022-12-17   
346-600 A Humble TX HSTNTXYADS5  560      
346-600 0 Humble TX   560   2015-05-25   
346-600 6 Humble TX   560   2015-05-25   
346-600 9 Humble TX   560   2015-05-25   
346-601 2 Houston TX   560   2022-12-20   
346-601 3 Houston TX   560   2022-12-20   
346-601 4 Houston TX   560   2022-12-20   
346-601 5 Houston TX   560   2022-12-20   
346-601 6 Houston TX   560   2022-12-20   
346-601 7 Houston TX   560   2022-12-20   
346-601 8 Houston TX   560   2023-01-11   
346-601 9 Houston TX   560   2023-01-11   
346-603 5 Alvin TX   560   2022-12-29   
346-605 8 Houston Suburban TX   560   2023-10-14   
346-608 0 Katy TX   560   2024-02-22   
346-608 7 Katy TX   560   2023-02-08   
346-608 8 Katy TX   560   2023-02-08   
346-608 9 Katy TX   560   2024-02-22   
346-609 1 Bammel TX   560   2023-06-22   
346-610 A Houston TX   560      
346-610 9 Houston TX   560   2019-01-19   
346-612 8 Cleveland TX   560   2023-07-15   
346-614 4 Houston Suburban TX   560   2023-02-20   
346-614 5 Houston Suburban TX   560   2023-02-20   
346-615 A Katy TX KATYTXXA9MD  560      
346-615 0 Katy TX   560   2023-09-17   
346-615 1 Katy TX   560   2024-02-22   
346-615 2 Katy TX   560   2023-07-15   
346-615 3 Katy TX   560   2023-03-10   
346-615 4 Katy TX   560   2023-03-10   
346-615 5 Katy TX   560   2024-02-22   
346-615 6 Katy TX   560   2024-02-22   
346-615 7 Katy TX   560   2024-02-22   
346-615 8 Katy TX   560   2024-05-20   
346-615 9 Katy TX   560   2024-06-29   
346-616 0 Humble TX   560   2016-03-02   
346-616 1 Humble TX   560   2016-03-02   
346-616 9 Humble TX   560   2017-11-09   
346-617 2 Dickinson TX   560   2017-06-02   
346-620 3 Richmond-Rosenberg TX   560   2023-02-23   
346-620 4 Richmond-Rosenberg TX   560   2023-02-23   
346-621 0 Houston TX   560   2025-09-07   
346-621 1 Houston TX   560   2025-09-07   
346-623 1 Satsuma TX   560   2023-07-15   
346-623 2 Satsuma TX   560   2023-05-13   
346-623 3 Satsuma TX   560   2023-03-06   
346-623 4 Satsuma TX   560   2023-03-06   
346-623 5 Satsuma TX   560   2023-06-22   
346-623 6 Satsuma TX   560   2024-02-25   
346-626 1 Sugar Land TX   560   2022-12-15   
346-626 2 Sugar Land TX   560   2022-12-15   
346-626 3 Sugar Land TX   560   2022-12-15   
346-626 4 Sugar Land TX   560   2023-01-15   
346-633 A Deer Park TX HSTNTXYADS5  560      
346-633 2 Deer Park TX   560   2021-03-18   

<< 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 >>

Last updated: Tue, 13 Jan 2026 21:50:02 UTC

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.