NumberResearch Membership · Data 09/20/2026

Recent prefix assignments

355 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, last 30 days
8X8, INC. 38
ONVOY, LLC - CA 31
NEW CINGULAR WIRELESS PCS, LLC - IL 28
NEW CINGULAR WIRELESS PCS, LLC - DC 26
ONVOY, LLC - NJ 18
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
2002-08-26 910-377 1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NC 3235 TABOR CITY NC
2002-08-26 931-773 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → ONVOY, LLC - TN 525E SHELBYVL TN
2002-08-23 206-274 not yet reported which blocks → LEVEL 3 COMMUNICATIONS, LLC - WA 6121 SEATTLE WA
2002-08-23 289-669 not yet reported which blocks → Fido Solutions Inc. 5643 St. Catharines-Thorold —
2002-08-23 325-436 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → T-MOBILE USA, INC. 6529 SNYDER TX
2002-08-23 403-440 not yet reported which blocks → Bell West Inc. 2933 Calgary —
2002-08-23 514-651 not yet reported which blocks → Fido Solutions Inc. 5643 Montreal —
2002-08-23 514-652 not yet reported which blocks → Fido Solutions Inc. 5643 Montreal —
2002-08-23 517-518 3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 HOWELL MI
2002-08-23 519-498 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Kitchener-Waterloo —
2002-08-23 586-588 6XXX7XXX8XXX9XXX · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ARMADA MI
2002-08-23 586-630 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → WOW! INTERNET, CABLE AND PHONE 961J MT CLEMENS MI
2002-08-23 647-829 not yet reported which blocks → Fido Solutions Inc. 5643 Toronto —
2002-08-23 647-831 not yet reported which blocks → Fido Solutions Inc. 5643 Toronto —
2002-08-23 774-251 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 BARNSTABLE MA
2002-08-23 778-861 not yet reported which blocks → Fido Solutions Inc. 5643 New Westminster —
2002-08-23 778-862 not yet reported which blocks → Fido Solutions Inc. 5643 New Westminster —
2002-08-23 978-809 3XXX4XXX5XXX6XXX7XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 ANDOVER MA
2002-08-23 978-810 0XXX8XXX9XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 BEVERLY MA
2002-08-22 435-868 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → QWEST CORPORATION 9636 CEDAR CITY UT
2002-08-22 715-889 5XXX6XXX7XXX8XXX · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 LAONA WI
2002-08-22 740-436 4XXX7XXX9XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 RICHWOOD OH
2002-08-22 765-205 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IN 4803 CLINTON IN
2002-08-22 765-371 0XXX1XXX2XXX4XXX5XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IN 4803 LAFONTAINE IN
2002-08-22 765-612 2XXX6XXX8XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IN 4803 CRAWFODSVL IN
2002-08-22 765-633 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX · 7 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IN 4803 DENVER IN
2002-08-22 765-736 1XXX2XXX4XXX5XXX9XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IN 4803 JAMESTOWN IN
2002-08-22 805-548 0–9 XXXall 10 · 2 holders which blocks → NORCAST COMMUNICATIONS CORPORATION - CA 9807 SNLUSOBSPO CA
2002-08-22 806-440 0XXX7XXX8XXX9XXX · 3 holders which blocks → T-MOBILE USA, INC. 6529 PAMPA TX
2002-08-22 812-758 0XXX1XXX3XXX4XXX6XXX7XXX8XXX · 5 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - IN 7314 NEWBURGH IN
2002-08-22 832-858 not yet reported which blocks → AERIAL COMMUNICATIONS, INC. 6701 HOUSTON TX
2002-08-22 832-859 not yet reported which blocks → AERIAL COMMUNICATIONS, INC. 6701 HOUSTON TX
2002-08-22 832-860 not yet reported which blocks → AERIAL COMMUNICATIONS, INC. 6701 HOUSTON TX
2002-08-22 937-582 0–9 XXXall 10 · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 DE GRAFF OH
2002-08-22 937-589 0–9 XXXall 10 · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 HUNTSVILLE OH
2002-08-22 937-590 7XXX8XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 UNION CITY OH
2002-08-22 937-595 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 BELLEFNTAN OH
2002-08-22 937-598 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 E LIBERTY OH
2002-08-22 937-601 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 WMANSFIELD OH
2002-08-22 937-610 6XXX7XXX8XXX9XXX · 2 holders which blocks → CINCINNATI BELL EXTENDED TERRITORIES LLC - OH 309B DAYTON OH
2002-08-22 937-612 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 NO LEWISBG OH
2002-08-22 937-617 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 RIDGEWAY OH
2002-08-22 979-262 not yet reported which blocks → TEXAS COMMUNICATIONS, INC. 6820 WEIMAR TX
2002-08-21 269-277 5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BENTON HBR MI
2002-08-21 270-803 0XXX2XXX3XXX9XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - KY 4369 GREENVILLE KY
2002-08-21 270-804 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - KY 4369 MAYFIELD KY
2002-08-21 310-951 not yet reported which blocks → T-MOBILE USA, INC. 6529 TORRANCE CA
2002-08-21 312-927 not yet reported which blocks → T-MOBILE USA, INC. 6529 CHICGOZN01 IL
2002-08-21 323-387 1XXX3XXX4XXX5XXX7XXX8XXX9XXX · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 LSAN DA 14 CA
2002-08-21 330-212 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 AKRON OH

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.