All assignees
759 prefixes in 605 · initial assignments from the NANPA CO code file, 09/17/2026
| NPA-NXX | Rate center | OCN | Assigned | Pooled |
|---|---|---|---|---|
| 605-940 | SIOUX FLS | 6534 | — | — |
| 605-941 | SIOUX FLS | 6534 | — | — |
| 605-942 | PLANKINTON | 1677 | — | — |
| 605-943 | REEHEIGHTS | 1680 | — | — |
| 605-944 | MARTIN | 6534 | 2009-11-12 | Yes |
| 605-945 | PIERRE | 9631 | — | Yes |
| 605-946 | CORSICA | 1677 | — | — |
| 605-947 | WAUBAY | 1651 | — | — |
| 605-948 | HOVEN | 1680 | — | — |
| 605-949 | MILBANK | 6534 | — | Yes |
| 605-950 | — | — | ||
| 605-951 | SIOUX FLS | 106F | 2008-06-17 | Yes |
| 605-952 | ELK POINT | 106F | 2011-11-02 | Yes |
| 605-953 | HARTFORD | 6701 | 2016-04-25 | Yes |
| 605-954 | WATERTOWN | 106F | — | Yes |
| 605-955 | MOUND CITY | 1685 | — | — |
| 605-956 | WATERTOWN | 6569 | 2008-08-19 | Yes |
| 605-957 | BERESFORD | 1652 | — | Yes |
| 605-958 | — | — | ||
| 605-959 | — | — | ||
| 605-960 | HURON | 6569 | 2017-05-03 | Yes |
| 605-961 | SIOUX FLS | 197D | 2018-06-21 | Yes |
| 605-962 | BLUNT | 1680 | — | — |
| 605-963 | DELLRAPIDS | 6701 | 2016-04-25 | Yes |
| 605-964 | EAGLEBUTTE | 1647 | — | — |
| 605-965 | SIOUX FLS | 7024 | — | — |
| 605-966 | JEFFERSON | 1666 | — | — |
| 605-967 | FAITH | 1653 | — | — |
| 605-968 | HURON | 6569 | 2013-06-20 | Yes |
| 605-969 | NO KILGORE | 1577 | — | — |
| 605-970 | MARTIN | 6534 | 2017-11-14 | Yes |
| 605-971 | ABERDEEN | 6569 | 2020-10-12 | Yes |
| 605-972 | WESTJASPER | 162G | 2021-04-27 | Yes |
| 605-973 | ONIDA | 1680 | — | — |
| 605-974 | RAPID CITY | 6701 | 2025-03-03 | Yes |
| 605-975 | YANKTON | 162G | 2019-06-11 | Yes |
| 605-976 | — | — | ||
| 605-977 | SIOUX FLS | 9631 | — | — |
| 605-978 | SIOUX FLS | 9631 | — | — |
| 605-979 | NOSIOUX CY | 073H | — | Yes |
| 605-980 | MARTIN | 6534 | 2017-11-01 | Yes |
| 605-981 | RAPID CITY | 6701 | 2019-10-29 | Yes |
| 605-982 | ABERDEEN | 516J | 2022-02-08 | Yes |
| 605-983 | ARLINGTON | 9631 | — | Yes |
| 605-984 | HUDSON | 1642 | — | — |
| 605-985 | ENNING | 1659 | — | — |
| 605-987 | CANTON | 9631 | — | Yes |
| 605-988 | SIOUX FLS | 9631 | — | Yes |
| 605-989 | NOVALENTIN | 478J | 2020-10-29 | Yes |
| 605-990 | MITCHELL | 682C | 2004-10-01 | — |
| 605-991 | MILBANK | 580H | 2021-03-31 | Yes |
| 605-992 | BIGSTONECY | 516J | 2022-02-24 | Yes |
| 605-993 | WASTA | 1659 | — | — |
| 605-994 | HECLA | 1664 | — | Yes |
| 605-995 | MITCHELL | 9631 | — | — |
| 605-996 | MITCHELL | 9631 | — | — |
| 605-997 | FLANDREAU | 9631 | — | Yes |
| 605-998 | MILLER | 162G | 2021-07-29 | Yes |
| 605-999 | MITCHELL | 6569 | — | — |
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.