All assignees
766 prefixes in 346 · initial assignments from the NANPA CO code file, 09/17/2026
| NPA-NXX | Rate center | OCN | Assigned | Pooled |
|---|---|---|---|---|
| 346-900 | SUGAR LAND | 903C | 2015-03-26 | Yes |
| 346-901 | SUGAR LAND | 7074 | 2015-04-29 | Yes |
| 346-902 | DICKINSON | 624H | 2021-11-16 | Yes |
| 346-904 | BAMMEL | 6701 | 2025-11-17 | Yes |
| 346-905 | SPRING | 6506 | 2025-12-03 | Yes |
| 346-906 | HOUSTON | 490J | 2025-12-04 | Yes |
| 346-907 | HSTNSUBURB | 6701 | 2016-03-11 | Yes |
| 346-908 | SMITHERSLK | 508J | 2015-05-08 | Yes |
| 346-909 | BAMMEL | 6534 | 2025-12-09 | Yes |
| 346-910 | MONTBLVIEU | 903C | 2020-12-18 | Yes |
| 346-911 | XXXXXXXXXX | MULT | — | — |
| 346-912 | ALVIN | 903C | 2025-12-17 | Yes |
| 346-913 | TOMBALL | 903C | 2025-12-17 | Yes |
| 346-914 | CYPRESS | 6534 | 2025-12-18 | Yes |
| 346-916 | LANGHAMCRK | 6534 | 2025-12-29 | Yes |
| 346-917 | CHANNELVW | 004F | 2016-06-24 | Yes |
| 346-918 | HSTNSUBURB | 6534 | 2025-12-31 | Yes |
| 346-919 | BAMMEL | 6701 | 2026-01-12 | Yes |
| 346-920 | HOUSTON | 6534 | 2026-02-17 | Yes |
| 346-921 | BAMMEL | 903C | 2026-03-11 | Yes |
| 346-922 | BROOKSHIRE | 965H | 2021-07-16 | Yes |
| 346-923 | HOUSTON | 6534 | 2026-03-27 | Yes |
| 346-924 | HOUSTON | 490J | 2026-04-02 | Yes |
| 346-925 | HOUSTON | 903C | 2026-04-09 | Yes |
| 346-926 | HUFFMAN | 903C | 2026-04-09 | Yes |
| 346-927 | LANGHAMCRK | 6534 | 2026-05-06 | Yes |
| 346-928 | CYPRESS | 6506 | 2026-05-18 | Yes |
| 346-929 | HOUSTON | 6534 | 2026-06-09 | Yes |
| 346-930 | HOUSTON | 6534 | 2026-06-10 | Yes |
| 346-931 | PORTER | 6534 | 2026-07-08 | Yes |
| 346-932 | HOUSTON | 903C | 2014-05-08 | Yes |
| 346-933 | RICHMNRNBG | 965H | 2021-07-16 | Yes |
| 346-934 | KATY | 6534 | 2026-07-22 | Yes |
| 346-935 | HSTNSUBURB | 903C | 2026-07-24 | Yes |
| 346-936 | CLEVELAND | 5562 | 2026-06-15 | Yes |
| 346-937 | SPRING | 903C | 2026-07-24 | Yes |
| 346-938 | BAMMEL | 903C | 2026-07-30 | Yes |
| 346-939 | LANGHAMCRK | 6534 | 2026-08-20 | Yes |
| 346-941 | CHANNELVW | 6534 | 2024-11-07 | Yes |
| 346-942 | CYPRESS | 903C | 2026-08-21 | Yes |
| 346-943 | RICHMNRNBG | 903C | 2026-08-21 | Yes |
| 346-944 | LEAGUECITY | 903C | 2026-08-27 | Yes |
| 346-945 | MANVEL | 903C | 2026-09-03 | Yes |
| 346-946 | CYPRESS | 965H | 2020-07-02 | Yes |
| 346-947 | ARCOLA | 829J | 2026-09-11 | Yes |
| 346-950 | — | — | ||
| 346-954 | DEER PARK | 516C | 2016-05-23 | Yes |
| 346-955 | DICKINSON | 965H | 2020-07-09 | Yes |
| 346-958 | MULT | — | — | |
| 346-959 | MULT | — | — | |
| 346-966 | PORTER | 965H | 2021-05-10 | Yes |
| 346-970 | BAMMEL | 829J | 2015-09-14 | Yes |
| 346-971 | HOUSTON | 9533 | 2015-09-14 | Yes |
| 346-976 | — | — | ||
| 346-977 | BAYTOWN | 965H | 2019-09-20 | Yes |
| 346-978 | LANGHAMCRK | 516C | 2015-05-05 | Yes |
| 346-980 | HOUSTON | 004F | — | Yes |
| 346-981 | HOUSTON | 193E | 2026-09-16 | Yes |
| 346-986 | HUMBLE | 6701 | 2026-04-28 | Yes |
| 346-988 | CLEVELAND | 965H | 2019-05-21 | Yes |
| 346-992 | HOUSTON | 053L | 2026-08-05 | Yes |
| 346-995 | LANGHAMCRK | 903C | 2026-08-19 | Yes |
| 346-996 | LANGHAMCRK | 6506 | 2026-08-06 | Yes |
| 346-997 | SATSUMA | 7138 | 2026-07-21 | Yes |
| 346-998 | HOUSTON | 177F | 2016-10-19 | Yes |
| 346-999 | HUFFMAN | 319D | 2014-01-16 | Yes |
These are initial assignees from NANPA CO-code records — because of number portability, the current serving carrier of individual numbers may differ. Bulk export requires a membership.