NumberResearch Membership · Data 09/19/2026

Recent prefix assignments

0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/19/2026

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 712
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 68
QWEST CORPORATION 64
WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH 48
NEW CINGULAR WIRELESS PCS, LLC - IL 43
ONVOY, LLC - IA 30
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
2006-03-07 712-560 0–9 XXXall 10 · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IA 9877 SIOUX CITY IA
2006-02-22 712-333 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SIOUX CITY IA
2006-01-09 712-577 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 SIOUX CITY IA
2005-12-30 712-404 0XXX1XXX3XXX4XXX8XXX9XXX · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 HARLAN IA
2005-08-08 712-797 not yet reported which blocks → T-MOBILE USA, INC. 6529 WALL LAKE IA
2005-08-08 712-854 0XXX1XXX2XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 DENISON IA
2005-07-14 712-693 0XXX1XXX2XXX3XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 SAC CITY IA
2005-06-23 712-432 not yet reported which blocks → GREAT LAKES COMMUNICATION CORP. - IA 345D LAKE PARK IA
2005-06-01 712-584 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SPENCER IA
2004-11-11 712-427 9XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 BEDFORD IA
2004-09-08 712-893 not yet reported which blocks → COMMCHOICE OF IOWA, LLC 4092 DANBURY IA
2004-08-25 712-665 not yet reported which blocks → CORN BELT COMMUNICATIONS, INC. - IA 3699 LAKE VIEW IA
2004-07-14 712-212 0–9 XXXall 10 · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SIOUX CITY IA
2004-05-27 712-870 5XXX6XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 MOVILLE IA
2004-05-25 712-207 2XXX3XXX4XXX5XXX · 3 holders which blocks → WALNUT TELEPHONE COMPANY, INC. - IA 774B SHELBY IA
2004-05-25 712-407 1XXX2XXX4XXX7XXX · 3 holders which blocks → WALNUT TELEPHONE COMPANY, INC. - IA 774B MINDEN IA
2003-10-21 712-303 7XXX8XXX9XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 CLARINDA IA
2003-10-21 712-313 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 SIDNEY IA
2003-07-24 712-355 0–9 XXXall 10 · 3 holders which blocks → UNITED STATES CELLULAR - IA 6266 COUNCILBLF IA
2003-07-01 712-334 1XXX3XXX7XXX9XXX · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 SIOUX RPD IA
2003-04-04 712-775 not yet reported which blocks → BTC, INC. - IA 156C CARROLL IA
2003-03-31 712-208 1XXX2XXX3XXX4XXX8XXX9XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MAPLETON IA
2003-03-31 712-219 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ONAWA IA
2003-03-28 712-222 not yet reported which blocks → LONG LINES METRO, INC. - IA 828B SIOUX CITY IA
2003-02-21 712-215 0–9 XXXall 10 · 5 holders which blocks → UNITED STATES CELLULAR - IA 6266 SHENANDOAH IA
2003-02-21 712-285 not yet reported which blocks → NORTHWEST IOWA TELEPHONE, LLC 1260 SERGENTBLF IA
2003-02-03 712-216 3XXX4XXX6XXX7XXX8XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 LOGAN IA
2003-02-03 712-304 3XXX6XXX8XXX9XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 EXIRA IA
2003-02-03 712-307 3XXX6XXX8XXX · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 AVOCA IA
2002-12-06 712-881 not yet reported which blocks → MAPLETON COMMUNICATIONS UTILITY - IA 130A MAPLETON IA
2002-11-12 712-942 not yet reported which blocks → NORTHWEST IOWA TELEPHONE, LLC 1260 SERGENTBLF IA
2002-10-02 712-346 0XXX3XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → T-MOBILE USA, INC. 6529 SPENCER IA
2002-09-04 712-228 not yet reported which blocks → NORTHWEST IOWA TELEPHONE, LLC 1260 SERGENTBLF IA
2002-07-17 712-298 3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 EMMETSBURG IA
2002-06-28 712-238 not yet reported which blocks → LONG LINES METRO, INC. - IA 828B SIOUX CITY IA
2002-05-21 712-934 not yet reported which blocks → NORTHWEST IOWA TELEPHONE, LLC 1260 SERGENTBLF IA
2002-04-17 712-435 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 COUNCILBLF IA
2002-03-18 712-310 2XXX3XXX4XXX5XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 COUNCILBLF IA
2002-03-12 712-924 not yet reported which blocks → NORTHWEST IOWA TELEPHONE, LLC 1260 SERGENTBLF IA
2002-01-31 712-455 not yet reported which blocks → COMMCHOICE OF IOWA, LLC 4092 WHITING IA
2002-01-22 712-930 not yet reported which blocks → COMMUNITY CABLE TV AGCY O'BRIEN CO. DBA COMM.-IA 3112 SANBORN IA
2001-11-16 712-360 1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 ORANGECITY IA
2001-11-09 712-923 not yet reported which blocks → NORTHWEST IOWA TELEPHONE, LLC 1260 SERGENTBLF IA
2001-11-01 712-395 4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → UNITED STATES CELLULAR - IA 6266 ORANGECITY IA
2001-10-26 712-209 5XXX8XXX9XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 ESTHERVL IA
2001-10-18 712-928 not yet reported which blocks → COMMUNITY CABLE TV AGCY O'BRIEN CO. DBA COMM.-IA 3112 HARTLEY IA
2001-10-18 712-949 not yet reported which blocks → COMMUNITY CABLE TV AGCY O'BRIEN CO. DBA COMM.-IA 3112 PAULLINA IA
2001-10-18 712-957 not yet reported which blocks → COMMUNITY CABLE TV AGCY O'BRIEN CO. DBA COMM.-IA 3112 PRIMGHAR IA
2001-07-23 712-574 3XXX4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SIOUX CITY IA
2001-07-06 712-247 not yet reported which blocks → NORTHWEST IOWA TELEPHONE, LLC 1260 SERGENTBLF IA

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.