All assignees
800 prefixes in 503 · initial assignments from the NANPA CO code file, 09/17/2026
| NPA-NXX | Rate center | OCN | Assigned | Pooled |
|---|---|---|---|---|
| 503-900 | LYONS | 936F | 2009-06-19 | Yes |
| 503-901 | PORTLAND | 6529 | — | Yes |
| 503-902 | WOODBURN | 936F | 2009-06-03 | Yes |
| 503-903 | PORTLAND | 6630 | — | — |
| 503-904 | PORTLAND | 6630 | — | — |
| 503-905 | CLACKAMAS | 7172 | — | Yes |
| 503-906 | BEAVERTON | 7172 | — | Yes |
| 503-907 | GRESHAM | 7172 | — | Yes |
| 503-908 | CLACKAMAS | 318J | — | Yes |
| 503-909 | PORTLAND | 9638 | — | — |
| 503-910 | SALEM | 5820 | — | — |
| 503-911 | XXXXXXXXXX | MULT | — | — |
| 503-912 | GRESHAM | 318J | 2006-10-05 | Yes |
| 503-913 | PORTLAND | 6010 | — | — |
| 503-914 | PORTLAND | 6529 | — | Yes |
| 503-915 | PORTLAND | 6010 | 2008-12-18 | Yes |
| 503-916 | PORTLAND | 9638 | — | Yes |
| 503-917 | DALLAS | 6529 | — | Yes |
| 503-918 | GRESHAM | 750E | 2026-09-03 | Yes |
| 503-919 | CLACKAMAS | 6010 | — | Yes |
| 503-920 | PORTLAND | 6630 | — | — |
| 503-921 | PORTLAND | 6630 | — | — |
| 503-922 | PORTLAND | 7229 | 2005-05-18 | Yes |
| 503-923 | BEAVERTON | 647F | — | — |
| 503-924 | BEAVERTON | 7172 | — | Yes |
| 503-925 | SHERWOOD | 4323 | — | Yes |
| 503-926 | PORTLAND | 6010 | 2008-09-10 | Yes |
| 503-927 | PORTLAND | 6529 | 2006-01-12 | Yes |
| 503-928 | PORTLAND | 6010 | 2006-08-08 | Yes |
| 503-929 | PORTLAND | 6010 | 2005-11-03 | Yes |
| 503-930 | SALEM | 5820 | — | — |
| 503-931 | SALEM | 6010 | — | — |
| 503-932 | SALEM | 6529 | — | Yes |
| 503-933 | PORTLAND | 6010 | 2006-07-28 | Yes |
| 503-934 | SALEM | 9638 | 2005-09-12 | Yes |
| 503-935 | PORTLAND | 6010 | 2007-03-12 | Yes |
| 503-936 | PORTLAND | 5820 | — | — |
| 503-937 | PORTLAND | 7229 | — | — |
| 503-938 | PORTLAND | 6630 | — | — |
| 503-939 | PORTLAND | 5820 | — | — |
| 503-940 | PORTLAND | 6630 | — | — |
| 503-941 | BEAVERTON | 7537 | — | Yes |
| 503-942 | PORTLAND | 6630 | — | — |
| 503-943 | PORTLAND | 7172 | — | Yes |
| 503-944 | PORTLAND | 9638 | — | Yes |
| 503-945 | SALEM | 9638 | — | — |
| 503-946 | PORTLAND | 7531 | — | Yes |
| 503-947 | SALEM | 9638 | — | — |
| 503-948 | PORTLAND | 9638 | — | — |
| 503-949 | SALEM | 5820 | — | — |
| 503-950 | — | — | ||
| 503-951 | WOODBURN | 5820 | — | Yes |
| 503-952 | PORTLAND | 9638 | — | Yes |
| 503-953 | PORTLAND | 5820 | 2007-08-08 | Yes |
| 503-954 | PORTLAND | 6010 | 2007-03-12 | Yes |
| 503-955 | PORTLAND | 6630 | — | — |
| 503-956 | PORTLAND | 5820 | 2005-06-14 | Yes |
| 503-957 | PORTLAND | 6529 | — | Yes |
| 503-958 | — | — | ||
| 503-959 | — | — | ||
| 503-960 | PORTLAND | 6010 | 2007-02-26 | Yes |
| 503-961 | PORTLAND | 7172 | — | Yes |
| 503-962 | PORTLAND | 9638 | — | Yes |
| 503-963 | PORTLAND | 9638 | — | — |
| 503-964 | PORTLAND | 5820 | 2009-07-10 | Yes |
| 503-965 | PACIFIC CY | 4520 | — | — |
| 503-966 | WESTPORT | 750E | 2007-07-20 | Yes |
| 503-967 | SALEM | 7172 | — | Yes |
| 503-968 | BEAVERTON | 4323 | — | — |
| 503-969 | PORTLAND | 5562 | — | Yes |
| 503-970 | PORTLAND | 6010 | — | — |
| 503-971 | — | — | ||
| 503-972 | PORTLAND | 7172 | — | — |
| 503-973 | PORTLAND | 9638 | — | — |
| 503-974 | CLACKAMAS | 318J | — | Yes |
| 503-975 | PORTLAND | 6529 | — | Yes |
| 503-976 | — | — | ||
| 503-977 | PORTLAND | 9638 | — | — |
| 503-978 | PORTLAND | 9638 | — | — |
| 503-979 | STAYTON | 936F | 2009-06-19 | Yes |
| 503-980 | WOODBURN | 9638 | — | Yes |
| 503-981 | WOODBURN | 9638 | — | — |
| 503-982 | WOODBURN | 9638 | — | — |
| 503-983 | SALEM | 5820 | 2009-03-11 | Yes |
| 503-984 | WOODBURN | 6529 | — | Yes |
| 503-985 | BEAVERTON | 4323 | — | Yes |
| 503-986 | SALEM | 9638 | — | — |
| 503-987 | SCAPPOOSE | 318J | 2005-12-08 | Yes |
| 503-988 | PORTLAND | 9638 | — | — |
| 503-989 | WOODBURN | 6010 | — | Yes |
| 503-990 | SALEM | 5562 | — | Yes |
| 503-991 | SALEM | 5562 | — | Yes |
| 503-992 | BEAVERTON | 4323 | — | Yes |
| 503-993 | PORTLAND | 6630 | — | — |
| 503-994 | WARRENTON | 750E | 2006-09-25 | Yes |
| 503-995 | PORTLAND | 6010 | 2007-02-08 | Yes |
| 503-996 | MOUNTANGEL | 936F | 2009-06-19 | Yes |
| 503-997 | PORTLAND | 6529 | — | — |
| 503-998 | PORTLAND | 6529 | — | — |
| 503-999 | SALEM | 6529 | — | — |
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.