NumberResearch Membership · Data 09/20/2026

Recent prefix assignments

0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/20/2026

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 814
CORE COMMUNICATIONS, INC. - PA 48
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
Clear Download CSV ↓
Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
2018-06-06 814-500 0–9 XXXall 10 · 6 holders which blocks → CORE COMMUNICATIONS, INC. - PA 3806 HUNTINGDON PA
2009-03-31 814-214 0–9 XXXall 10 · 3 holders which blocks → CORE COMMUNICATIONS, INC. - PA 3806 ORBISONIA PA
2009-03-31 814-910 0–9 XXXwhole prefix which blocks → CORE COMMUNICATIONS, INC. - PA 3806 SHADE GAP PA
2009-03-30 814-252 0–9 XXXall 10 · 3 holders which blocks → CORE COMMUNICATIONS, INC. - PA 3806 CONNEAUTLK PA
2009-03-30 814-576 0–9 XXXall 10 · 2 holders which blocks → CORE COMMUNICATIONS, INC. - PA 3806 CONNEAUTVL PA
2009-03-30 814-872 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX which blocks → CORE COMMUNICATIONS, INC. - PA 3806 GUYS MILLS PA
2009-03-30 814-906 0–9 XXXwhole prefix which blocks → CORE COMMUNICATIONS, INC. - PA 3806 BEDFORDVLY PA
2009-03-30 814-912 0XXX1XXX2XXX3XXX4XXX5XXX6XXX which blocks → CORE COMMUNICATIONS, INC. - PA 3806 LINESVILLE PA
2009-03-26 814-813 0–9 XXXall 10 · 5 holders which blocks → CORE COMMUNICATIONS, INC. - PA 3806 CAMBDG SPG PA
2009-03-18 814-963 0–9 XXXall 10 · 4 holders which blocks → CORE COMMUNICATIONS, INC. - PA 3806 WILCOX PA
2009-03-17 814-557 0–9 XXXall 10 · 3 holders which blocks → CORE COMMUNICATIONS, INC. - PA 3806 DRIFTWOOD PA
2009-03-17 814-565 0–9 XXXall 10 · 3 holders which blocks → CORE COMMUNICATIONS, INC. - PA 3806 CLEARVILLE PA
2009-03-17 814-578 0–9 XXXall 10 · 4 holders which blocks → CORE COMMUNICATIONS, INC. - PA 3806 WEEDVILLE PA
2009-03-17 814-727 0–9 XXXall 10 · 3 holders which blocks → CORE COMMUNICATIONS, INC. - PA 3806 SHEFFIELD PA
2009-03-17 814-820 0XXX1XXX2XXX3XXX7XXX8XXX · 5 holders which blocks → CORE COMMUNICATIONS, INC. - PA 3806 RIMERSBURG PA
2009-03-17 814-914 0–9 XXXall 10 · 3 holders which blocks → CORE COMMUNICATIONS, INC. - PA 3806 CORSICA PA
2009-03-17 814-978 0XXX1XXX2XXX3XXX which blocks → CORE COMMUNICATIONS, INC. - PA 3806 DUKECENTER PA
2009-03-17 814-991 0–9 XXXall 10 · 3 holders which blocks → CORE COMMUNICATIONS, INC. - PA 3806 SIGEL PA
2009-03-17 814-994 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 2 holders which blocks → CORE COMMUNICATIONS, INC. - PA 3806 COLVER PA
2009-03-16 814-294 0–9 XXXall 10 · 4 holders which blocks → CORE COMMUNICATIONS, INC. - PA 3806 KERSEY PA
2009-03-16 814-416 0–9 XXXall 10 · 2 holders which blocks → CORE COMMUNICATIONS, INC. - PA 3806 NEWGRENADA PA
2009-03-16 814-527 0–9 XXXall 10 · 5 holders which blocks → CORE COMMUNICATIONS, INC. - PA 3806 RIDGWAY PA
2009-03-16 814-551 0–9 XXXall 10 · 4 holders which blocks → CORE COMMUNICATIONS, INC. - PA 3806 PENFIELD PA
2009-03-16 814-605 0–9 XXXall 10 · 3 holders which blocks → CORE COMMUNICATIONS, INC. - PA 3806 MCONELLSTN PA
2009-03-16 814-630 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 2 holders which blocks → CORE COMMUNICATIONS, INC. - PA 3806 PT MATILDA PA
2009-03-16 814-802 0–9 XXXall 10 · 5 holders which blocks → CORE COMMUNICATIONS, INC. - PA 3806 YOUNGSVL PA
2009-03-16 814-829 0–9 XXXall 10 · 2 holders which blocks → CORE COMMUNICATIONS, INC. - PA 3806 MARKLESBG PA
2009-03-13 814-524 0–9 XXXall 10 · 5 holders which blocks → CORE COMMUNICATIONS, INC. - PA 3806 JOHNSONBG PA
2009-03-12 814-292 0–9 XXXall 10 · 3 holders which blocks → CORE COMMUNICATIONS, INC. - PA 3806 HAZEN PA
2009-03-12 814-307 0–9 XXXall 10 · 2 holders which blocks → CORE COMMUNICATIONS, INC. - PA 3806 BROCKWAY PA
2009-03-12 814-396 0–9 XXXall 10 · 2 holders which blocks → CORE COMMUNICATIONS, INC. - PA 3806 SAEGERTOWN PA
2009-03-12 814-501 0–9 XXXall 10 · 3 holders which blocks → CORE COMMUNICATIONS, INC. - PA 3806 CALLENSBG PA
2009-03-12 814-513 0XXX2XXX · 2 holders which blocks → CORE COMMUNICATIONS, INC. - PA 3806 VENUS PA
2009-03-12 814-668 0–9 XXXwhole prefix which blocks → CORE COMMUNICATIONS, INC. - PA 3806 ROCKLAND PA
2009-03-12 814-815 0–9 XXXall 10 · 2 holders which blocks → CORE COMMUNICATIONS, INC. - PA 3806 WSPRINGFLD PA
2009-03-12 814-982 0–9 XXXwhole prefix which blocks → CORE COMMUNICATIONS, INC. - PA 3806 TOWNVILLE PA
2009-03-12 814-993 0–9 XXXall 10 · 3 holders which blocks → CORE COMMUNICATIONS, INC. - PA 3806 BREEZEWOOD PA
2009-03-05 814-415 not yet reported which blocks → CORE COMMUNICATIONS, INC. - PA 3806 FAIRVIEW PA
2006-03-08 814-520 0–9 XXXall 10 · 3 holders which blocks → CORE COMMUNICATIONS, INC. - PA 3806 ERIE PA
2003-07-10 814-264 0–9 XXXall 10 · 5 holders which blocks → CORE COMMUNICATIONS, INC. - PA 3806 HOWARD PA
2002-12-05 814-889 0–9 XXXall 10 · 4 holders which blocks → CORE COMMUNICATIONS, INC. - PA 3806 ALTOONA PA
2001-05-30 814-420 0–9 XXXall 10 · 7 holders which blocks → CORE COMMUNICATIONS, INC. - PA 3806 BARNESBORO PA
— 814-410 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → CORE COMMUNICATIONS, INC. - PA 3806 JOHNSTOWN PA
— 814-497 0–9 XXXall 10 · 7 holders which blocks → CORE COMMUNICATIONS, INC. - PA 3806 HOUTZDALE PA
— 814-612 0–9 XXXall 10 · 6 holders which blocks → CORE COMMUNICATIONS, INC. - PA 3806 REYNOLDSVL PA
— 814-620 0XXX1XXX2XXX3XXX4XXX7XXX · 3 holders which blocks → CORE COMMUNICATIONS, INC. - PA 3806 SCHELLSBG PA
— 814-712 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → CORE COMMUNICATIONS, INC. - PA 3806 REW PA
— 814-917 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → CORE COMMUNICATIONS, INC. - PA 3806 LEEPER PA

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.