NumberResearchRecent prefix assignments
0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/20/2026
The Code holder is who opened each NPA-NXX prefix — not necessarily who holds the numbers. A prefix is 10,000 numbers, but under pooling its ten 1,000-number blocks are handed out individually, often to different carriers; the code holder may hold only one block, or none. The Thousands-blocks column shows how the ten blocks are really split — click which blocks → to see who holds each 1,000-number block and its last-4-digit range. Assignments are initial assignments; the current serving carrier may differ due to portability.
| Assigned | NPA-NXX | Thousands-blocks taken (last-4 opening) | Code holder | OCN | Rate center | State |
|---|---|---|---|---|---|---|
| — | 301-978 | 0XXX1XXX3XXX6XXX7XXX · 4 holders which blocks → | VERIZON MARYLAND, INC. | 9212 | WSNGTNZN10 | MD |
| — | 301-982 | not yet reported which blocks → | VERIZON MARYLAND, INC. | 9212 | WSNG236Z13 | MD |
| — | 301-983 | not yet reported which blocks → | VERIZON MARYLAND, INC. | 9212 | WSNGTNZN10 | MD |
| — | 301-984 | not yet reported which blocks → | VERIZON MARYLAND, INC. | 9212 | WSNGTNZN11 | MD |
| — | 301-985 | 2XXX which blocks → | VERIZON MARYLAND, INC. | 9212 | WSHNGTNZN4 | MD |
| — | 301-986 | not yet reported which blocks → | VERIZON MARYLAND, INC. | 9212 | WSHNGTNZN2 | MD |
| — | 301-987 | not yet reported which blocks → | VERIZON MARYLAND, INC. | 9212 | GAITHERSBG | MD |
| — | 301-989 | not yet reported which blocks → | VERIZON MARYLAND, INC. | 9212 | WSNGTNZN12 | MD |
| — | 301-990 | not yet reported which blocks → | VERIZON MARYLAND, INC. | 9212 | GAITHERSBG | MD |
| — | 301-993 | not yet reported which blocks → | VERIZON MARYLAND, INC. | 9212 | WSNG236Z13 | MD |
| — | 301-994 | 4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → | VERIZON MARYLAND, INC. | 9212 | LXTNPKGRML | MD |
| — | 301-995 | not yet reported which blocks → | VERIZON MARYLAND, INC. | 9212 | LXTNPKGRML | MD |
| — | 301-997 | 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | VERIZON MARYLAND, INC. | 9212 | LEONARDTN | MD |
| — | 301-998 | not yet reported which blocks → | VERIZON MARYLAND, INC. | 9212 | WSNGTNZN11 | MD |
| — | 301-999 | not yet reported which blocks → | VERIZON MARYLAND, INC. | 9212 | HAGERSTOWN | MD |
Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.