NumberResearch Membership · Data 09/25/2026

Recent prefix assignments

0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/25/2026

Full prefixes (NXX) Thousands-blocks (1,000-number pools)

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, all time — NPA 610
VERIZON PENNSYLVANIA, INC. 325
New assignments by month Sep 2026 Aug 2026 Jul 2026 Jun 2026 May 2026 Apr 2026 Mar 2026 Feb 2026 Jan 2026 Dec 2025 Nov 2025 Oct 2025
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Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
2011-11-17 610-314 0–9 XXXall 10 · 4 holders which blocks → VERIZON PENNSYLVANIA, INC. 9208 W CHESTER PA
2008-09-24 610-732 0–9 XXXall 10 · 5 holders which blocks → VERIZON PENNSYLVANIA, INC. 9208 W CHESTER PA
2005-08-30 610-969 0–9 XXXall 10 · 3 holders which blocks → VERIZON PENNSYLVANIA, INC. 9208 ALLENTOWN PA
— 610-205 4XXX5XXX7XXX9XXX · 3 holders which blocks → VERIZON PENNSYLVANIA, INC. 9208 PHPHSBZN30 PA
— 610-206 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → VERIZON PENNSYLVANIA, INC. 9208 PHPHSBZN23 PA
— 610-208 not yet reported which blocks → VERIZON PENNSYLVANIA, INC. 9208 READING PA
— 610-210 not yet reported which blocks → VERIZON PENNSYLVANIA, INC. 9208 XXXXXXXXXX PA
— 610-219 not yet reported which blocks → VERIZON PENNSYLVANIA, INC. 9208 PHPHSBZN28 PA
— 610-222 1XXX5XXX6XXX7XXX · 4 holders which blocks → VERIZON PENNSYLVANIA, INC. 9208 CENTER PT PA
— 610-225 4XXX which blocks → VERIZON PENNSYLVANIA, INC. 9208 PHPHSBZN26 PA
— 610-231 not yet reported which blocks → VERIZON PENNSYLVANIA, INC. 9208 CATASAUQUA PA
— 610-236 2XXX3XXX5XXX6XXX7XXX · 3 holders which blocks → VERIZON PENNSYLVANIA, INC. 9208 READING PA
— 610-237 not yet reported which blocks → VERIZON PENNSYLVANIA, INC. 9208 PHPHSBZN14 PA
— 610-238 8XXX which blocks → VERIZON PENNSYLVANIA, INC. 9208 PHPHSBZN31 PA
— 610-239 not yet reported which blocks → VERIZON PENNSYLVANIA, INC. 9208 PHPHSBZN30 PA
— 610-240 not yet reported which blocks → VERIZON PENNSYLVANIA, INC. 9208 PHPHSBZN28 PA
— 610-244 1XXX8XXX which blocks → VERIZON PENNSYLVANIA, INC. 9208 COLLEGEVL PA
— 610-250 not yet reported which blocks → VERIZON PENNSYLVANIA, INC. 9208 EASTON PA
— 610-251 8XXX which blocks → VERIZON PENNSYLVANIA, INC. 9208 PHPHSBZN28 PA
— 610-252 not yet reported which blocks → VERIZON PENNSYLVANIA, INC. 9208 EASTON PA
— 610-253 not yet reported which blocks → VERIZON PENNSYLVANIA, INC. 9208 EASTON PA
— 610-254 not yet reported which blocks → VERIZON PENNSYLVANIA, INC. 9208 PHPHSBZN26 PA
— 610-255 2XXX6XXX7XXX8XXX · 4 holders which blocks → VERIZON PENNSYLVANIA, INC. 9208 KEMBLESVL PA
— 610-258 not yet reported which blocks → VERIZON PENNSYLVANIA, INC. 9208 EASTON PA
— 610-259 not yet reported which blocks → VERIZON PENNSYLVANIA, INC. 9208 PHPHSBZN17 PA
— 610-260 5XXX which blocks → VERIZON PENNSYLVANIA, INC. 9208 PHPHSBZN31 PA
— 610-261 5XXX6XXX7XXX8XXX · 2 holders which blocks → VERIZON PENNSYLVANIA, INC. 9208 NORTHAMPTN PA
— 610-262 not yet reported which blocks → VERIZON PENNSYLVANIA, INC. 9208 NORTHAMPTN PA
— 610-264 not yet reported which blocks → VERIZON PENNSYLVANIA, INC. 9208 CATASAUQUA PA
— 610-265 not yet reported which blocks → VERIZON PENNSYLVANIA, INC. 9208 PHPHSBZN30 PA
— 610-266 not yet reported which blocks → VERIZON PENNSYLVANIA, INC. 9208 CATASAUQUA PA
— 610-268 4XXX6XXX7XXX9XXX · 3 holders which blocks → VERIZON PENNSYLVANIA, INC. 9208 AVONDALE PA
— 610-269 not yet reported which blocks → VERIZON PENNSYLVANIA, INC. 9208 DOWNINGTN PA
— 610-270 not yet reported which blocks → VERIZON PENNSYLVANIA, INC. 9208 PHPHSBZN30 PA
— 610-272 not yet reported which blocks → VERIZON PENNSYLVANIA, INC. 9208 PHPHSBZN30 PA
— 610-273 0XXX5XXX6XXX8XXX · 4 holders which blocks → VERIZON PENNSYLVANIA, INC. 9208 HONEYBROOK PA
— 610-274 4XXX5XXX6XXX7XXX9XXX · 3 holders which blocks → VERIZON PENNSYLVANIA, INC. 9208 LANDENBERG PA
— 610-275 not yet reported which blocks → VERIZON PENNSYLVANIA, INC. 9208 PHPHSBZN30 PA
— 610-277 not yet reported which blocks → VERIZON PENNSYLVANIA, INC. 9208 PHPHSBZN30 PA
— 610-278 not yet reported which blocks → VERIZON PENNSYLVANIA, INC. 9208 PHPHSBZN30 PA
— 610-279 not yet reported which blocks → VERIZON PENNSYLVANIA, INC. 9208 PHPHSBZN30 PA
— 610-280 not yet reported which blocks → VERIZON PENNSYLVANIA, INC. 9208 EXTON PA
— 610-284 not yet reported which blocks → VERIZON PENNSYLVANIA, INC. 9208 PHPHSBZN17 PA
— 610-287 not yet reported which blocks → VERIZON PENNSYLVANIA, INC. 9208 SCHWENKSVL PA
— 610-292 not yet reported which blocks → VERIZON PENNSYLVANIA, INC. 9208 PHPHSBZN30 PA
— 610-293 not yet reported which blocks → VERIZON PENNSYLVANIA, INC. 9208 PHPHSBZN26 PA
— 610-296 not yet reported which blocks → VERIZON PENNSYLVANIA, INC. 9208 PHPHSBZN28 PA
— 610-313 not yet reported which blocks → VERIZON PENNSYLVANIA, INC. 9208 PHPHSBZN30 PA
— 610-317 not yet reported which blocks → VERIZON PENNSYLVANIA, INC. 9208 BETHLEHEM PA
— 610-320 2XXX which blocks → VERIZON PENNSYLVANIA, INC. 9208 READING PA

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/25/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.