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16 prefixes in 616 · initial assignments from the NANPA CO code file, 09/17/2026
| NPA-NXX | Rate center | OCN | Assigned | Pooled |
|---|---|---|---|---|
| 616-205 | SPARTA | 817J | 2004-12-06 | Yes |
| 616-237 | ZEELAND | 817J | 2002-01-16 | — |
| 616-256 | GRAND RPDS | 817J | 2018-07-13 | Yes |
| 616-265 | GRAND RPDS | 817J | 2016-10-12 | Yes |
| 616-277 | BYRON CTR | 817J | 2004-11-17 | Yes |
| 616-287 | GRAND RPDS | 817J | 2018-10-04 | Yes |
| 616-582 | HOLLAND | 817J | — | — |
| 616-588 | GRAND RPDS | 817J | — | — |
| 616-619 | GREENVILLE | 817J | — | — |
| 616-743 | GRANDHAVEN | 817J | — | — |
| 616-757 | BORCULO | 817J | 2004-12-06 | Yes |
| 616-775 | IONIA | 817J | — | — |
| 616-825 | ADA | 817J | 2001-01-10 | — |
| 616-829 | CEDAR SPG | 817J | — | — |
| 616-839 | CLARKSVL | 817J | 2001-05-08 | — |
| 616-986 | ALLENDALE | 817J | 2004-12-06 | 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.