NumberResearchRecent prefix assignments
375 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/30/2026
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.
Most active assignees, last 30 days
New assignments by month
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Oct 2025
Quick find in this area code:
| Assigned | NPA-NXX | Thousands-blocks taken (last-4 opening) | Code holder | OCN | Rate center | State |
|---|---|---|---|---|---|---|
| — | 410-965 | not yet reported which blocks → | VERIZON MARYLAND, INC. | 9212 | WOODLAWN | MD |
| — | 410-966 | not yet reported which blocks → | VERIZON MARYLAND, INC. | 9212 | WOODLAWN | MD |
| — | 410-967 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | TOWSON | MD |
| — | 410-968 | 5XXX6XXX7XXX8XXX · 3 holders which blocks → | VERIZON MARYLAND, INC. | 9212 | CRISFIELD | MD |
| — | 410-969 | not yet reported which blocks → | VERIZON MARYLAND, INC. | 9212 | SEVERN | MD |
| — | 410-970 | 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD | 7228 | SYKESVILLE | MD |
| — | 410-971 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | CATONSVL | MD |
| — | 410-972 | 1XXX5XXX6XXX7XXX8XXX9XXX which blocks → | TELEPORT COMMUNICATIONS AMERICA, LLC - MD | 7325 | ANNAPOLIS | MD |
| — | 410-974 | not yet reported which blocks → | VERIZON MARYLAND, INC. | 9212 | SEVERNA PK | MD |
| — | 410-975 | 4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → | VERIZON MARYLAND, INC. | 9212 | SEVERNA PK | MD |
| — | 410-976 | not yet reported which blocks → | MULTIPLE OCN LISTING | MULT | BALTIMORE | MD |
| — | 410-977 | none assigned yet which blocks → | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | 6855 | BALTIMORE | MD |
| — | 410-978 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | CATONSVL | MD |
| — | 410-979 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | CATONSVL | MD |
| — | 410-980 | 0–9 XXXall 10 · 2 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | 6395 | ANNAPOLIS | MD |
| — | 410-981 | 3XXX9XXX · 2 holders which blocks → | VERIZON MARYLAND, INC. | 9212 | GLENBURNIE | MD |
| — | 410-983 | 1XXX3XXX6XXX8XXX9XXX · 3 holders which blocks → | VERIZON MARYLAND, INC. | 9212 | FORK | MD |
| — | 410-984 | none assigned yet which blocks → | METROPCS, INC. | 5562 | SYKESVILLE | MD |
| — | 410-985 | not yet reported which blocks → | BALTIMORE-WASHINGTON TELEPHONE (BWT) | 8697 | WATERLO236 | MD |
| — | 410-986 | not yet reported which blocks → | VERIZON MARYLAND, INC. | 9212 | BALTIMORE | MD |
| — | 410-987 | not yet reported which blocks → | VERIZON MARYLAND, INC. | 9212 | SEVERN | MD |
| — | 410-988 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → | VERIZON MARYLAND, INC. | 9212 | ELLICOTTCY | MD |
| — | 410-989 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → | VERIZON MARYLAND, INC. | 9212 | FORK | MD |
| — | 410-990 | not yet reported which blocks → | VERIZON MARYLAND, INC. | 9212 | ANNAPOLIS | MD |
| — | 410-991 | not yet reported which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | 6395 | ANNAPOLIS | MD |
| — | 410-992 | 2XXX which blocks → | VERIZON MARYLAND, INC. | 9212 | COLUMBIA | MD |
| — | 410-993 | not yet reported which blocks → | VERIZON MARYLAND, INC. | 9212 | GLENBURNIE | MD |
| — | 410-994 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → | VERIZON MARYLAND, INC. | 9212 | EDGEWOOD | MD |
| — | 410-995 | 4XXX5XXX7XXX8XXX9XXX · 3 holders which blocks → | VERIZON MARYLAND, INC. | 9212 | ELLICOTTCY | MD |
| — | 410-996 | 4XXX which blocks → | VERIZON MARYLAND, INC. | 9212 | ELKTON | MD |
| — | 410-997 | not yet reported which blocks → | VERIZON MARYLAND, INC. | 9212 | COLUMBIA | MD |
| — | 410-998 | 0XXX which blocks → | VERIZON MARYLAND, INC. | 9212 | PIKESVILLE | MD |
| — | 412-200 | 0XXX1XXX2XXX5XXX7XXX8XXX · 4 holders which blocks → | TELEPORT COMMUNICATIONS AMERICA, LLC - PA | 7315 | PTGSBNZN14 | PA |
| — | 412-201 | 0XXX which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PTTSBGZON1 | PA |
| — | 412-202 | 0–9 XXXwhole prefix which blocks → | ONVOY, LLC - PA | 547E | PTTSBGZON1 | PA |
| — | 412-203 | 0XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - PA | 4007 | PTGSBNZN15 | PA |
| — | 412-204 | 4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → | PAETEC ITEL, LLC | 829J | PTTSBGZON8 | PA |
| — | 412-205 | 0XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → | TELEPORT COMMUNICATIONS AMERICA, LLC - PA | 7315 | PTTSBGZON5 | PA |
| — | 412-206 | 1XXX3XXX4XXX5XXX6XXX7XXX9XXX · 4 holders which blocks → | PAETEC ITEL, LLC | 829J | PTGSBNZN13 | PA |
| — | 412-207 | 3XXX4XXX which blocks → | TELEPORT COMMUNICATIONS AMERICA, LLC - PA | 7315 | PTTSBGZON6 | PA |
| — | 412-208 | 4XXX5XXX · 2 holders which blocks → | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | PTTSBGZON1 | PA |
| — | 412-209 | 5XXX8XXX9XXX · 2 holders which blocks → | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | PTTSBGZON1 | PA |
| — | 412-210 | not yet reported which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | XXXXXXXXXX | PA |
| — | 412-211 | not yet reported which blocks → | MULTIPLE OCN LISTING | MULT | XXXXXXXXXX | PA |
| — | 412-213 | 1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → | TELEPORT COMMUNICATIONS AMERICA, LLC - PA | 7315 | PTGSBNZN18 | PA |
| — | 412-215 | not yet reported which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA | 6392 | PTTSBGZON1 | PA |
| — | 412-216 | not yet reported which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA | 6392 | PTTSBGZON1 | PA |
| — | 412-217 | none assigned yet which blocks → | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | WASHINGTON | PA |
| — | 412-220 | not yet reported which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PTGSBNZN13 | PA |
| — | 412-221 | not yet reported which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PTGSBNZN13 | PA |
Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/30/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.