NumberResearch Membership · Data 09/26/2026

Recent prefix assignments

360 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/26/2026

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, last 30 days
8X8, INC. 43
NEW CINGULAR WIRELESS PCS, LLC - DC 28
ONVOY, LLC - CA 26
NEW CINGULAR WIRELESS PCS, LLC - IL 26
Rogers Communications Canada Inc. (Wireless) 23
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
2012-02-08 667-203 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 BALTIMORE MD
2012-02-08 667-205 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 BALTIMORE MD
2012-02-08 667-207 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 BALTIMORE MD
2012-02-08 667-208 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 BALTIMORE MD
2012-02-08 667-209 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 BALTIMORE MD
2012-02-08 667-210 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 BALTIMORE MD
2012-02-08 667-212 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 BALTIMORE MD
2012-02-08 667-213 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 BALTIMORE MD
2012-02-08 667-214 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 BALTIMORE MD
2012-02-08 667-216 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 BALTIMORE MD
2012-02-08 667-217 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 BALTIMORE MD
2012-02-08 667-218 0–9 XXXall 10 · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 BALTIMORE MD
2012-02-08 667-219 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 BALTIMORE MD
2012-02-08 667-224 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 BALTIMORE MD
2012-02-08 667-234 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 BALTIMORE MD
2012-02-08 667-239 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 BALTIMORE MD
2012-02-08 702-815 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 LAS VEGAS NV
2012-02-08 857-208 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BOSTON MA
2012-02-07 219-212 0–9 XXXall 10 · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IN 4803 MEDARYVL IN
2012-02-07 219-215 0–9 XXXall 10 · 7 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IN 4803 LAKE VLG IN
2012-02-07 440-401 0–9 XXXall 10 · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 TRINITY OH
2012-02-07 469-307 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MCKINNEY TX
2012-02-07 512-605 0–9 XXXall 10 · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 7249 AUSTIN TX
2012-02-07 808-494 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 HILO HI
2012-02-07 865-672 0–9 XXXall 10 · 4 holders which blocks → CONCORD TEL. EXCH., INC. 0559 CONCORD TN
2012-02-06 201-354 0–9 XXXall 10 · 6 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NJ 6623 BAYONNE NJ
2012-02-06 226-241 not yet reported which blocks → Iristel Inc. 154E Kitchener-Waterloo —
2012-02-06 226-246 not yet reported which blocks → Videotron Ltd. 383F Windsor —
2012-02-06 276-292 0–9 XXXall 10 · 6 holders which blocks → COMCAST IP PHONE, LLC 318J RIDGEWAY VA
2012-02-06 276-421 0–9 XXXall 10 · 5 holders which blocks → COMCAST IP PHONE, LLC 318J BASSETT VA
2012-02-06 276-833 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → COMCAST IP PHONE, LLC 318J AXTON VA
2012-02-06 434-423 0–9 XXXall 10 · 6 holders which blocks → COMCAST IP PHONE, LLC 318J BACHESHALL VA
2012-02-06 587-353 not yet reported which blocks → Shaw Telecom Inc. 497E Calgary —
2012-02-06 587-521 not yet reported which blocks → Shaw Telecom Inc. 497E Edmonton —
2012-02-06 605-906 0–9 XXXall 10 · 4 holders which blocks → TELEPORT COMMUNICATIONS AMERICA SD-LLC 693G SIOUX FLS SD
2012-02-06 614-702 0–9 XXXall 10 · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 COLUMBUS OH
2012-02-06 631-408 0–9 XXXall 10 · 4 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 AMITYVILLE NY
2012-02-06 705-302 not yet reported which blocks → Iristel Inc. 154E Barrie —
2012-02-06 740-540 0–9 XXXwhole prefix which blocks → CHILLICOTHE TEL. CO. 0597 CHILLICOTH OH
2012-02-06 814-646 0XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 6 holders which blocks → WINDSTREAM PENNSYLVANIA, INC. 0176 BROOKVILLE PA
2012-02-06 917-702 0–9 XXXall 10 · 3 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 NWYRCYZN07 NY
2012-02-06 919-864 0–9 XXXall 10 · 6 holders which blocks → FRONTIER COMMUNICATIONS OF THE CAROLINAS INC. - NC 4334 DURHAM NC
2012-02-03 318-924 0–9 XXXall 10 · 6 holders which blocks → LEVEL 3 TELECOM OF LOUISIANA, LLC - LA 7488 BLANCHARD LA
2012-02-03 404-662 0–9 XXXall 10 · 3 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - GA 7435 ATLANTA GA
2012-02-03 406-508 0–9 XXXall 10 · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MT 9415 FRENCHTOWN MT
2012-02-03 504-405 0–9 XXXall 10 · 3 holders which blocks → VOICESTREAM GSM I, LLC 150C KENNER LA
2012-02-03 575-245 not yet reported which blocks → SIERRA COMMUNICATIONS, INC. - NM 713G RATON NM
2012-02-03 614-715 0–9 XXXall 10 · 4 holders which blocks → PAETEC ITEL, LLC 829J COLUMBUS OH
2012-02-03 631-483 0–9 XXXall 10 · 6 holders which blocks → TELENGY L.L.C. - NY 473G MONTAUK PT NY
2012-02-02 330-905 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 MARLBORO OH

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/26/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.