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
2019-08-29 712-401 0XXX1XXX2XXX3XXX4XXX5XXX7XXX · 3 holders which blocks → ONVOY, LLC - IA 221F CRESCENT IA
2019-08-29 712-409 0–9 XXXall 10 · 7 holders which blocks → ONVOY, LLC - IA 221F SILVERCITY IA
2019-07-30 712-492 0XXX1XXX2XXX3XXX4XXX8XXX9XXX · 6 holders which blocks → INTERSTATE CABLEVISION COMPANY - IA 860E OAKLAND IA
2019-07-02 712-361 0–9 XXXwhole prefix which blocks → LTE WIRELESS, INC. - IA 460J SCRANTON IA
2019-07-02 712-598 0–9 XXXwhole prefix which blocks → LTE WIRELESS, INC. - IA 460J ODEBOLT IA
2019-07-01 712-900 0XXX1XXX2XXX3XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLC - IA 221F HOLSTEIN IA
2019-06-25 712-638 0XXX1XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 STORM LAKE IA
2019-05-29 712-524 0–9 XXXall 10 · 7 holders which blocks → ONVOY, LLC - IA 221F COUNCILBLF IA
2019-04-30 712-517 0–9 XXXall 10 · 5 holders which blocks → AIRUS, INC - IA 423H RED OAK IA
2019-04-30 712-772 0XXX1XXX7XXX · 3 holders which blocks → AIRUS, INC - IA 423H MINEOLA IA
2019-04-30 712-787 0XXX1XXX2XXX5XXX8XXX9XXX · 5 holders which blocks → AIRUS, INC - IA 423H NEOLA IA
2019-02-07 712-521 0–9 XXXall 10 · 7 holders which blocks → BTC, INC. - IA 156C GLENWOOD IA
2018-12-27 712-321 0–9 XXXall 10 · 6 holders which blocks → C-M-L TELEPHONE COOPERATIVE ASSOCIATION OF MERIDEN 366J CHEROKEE IA
2018-10-24 712-345 0XXX1XXX3XXX4XXX5XXX6XXX7XXX · 3 holders which blocks → ONVOY, LLC - IA 221F NEMAHA IA
2018-10-24 712-354 1XXX2XXX3XXX4XXX5XXX6XXX7XXX · 3 holders which blocks → ONVOY, LLC - IA 221F CHARTEROAK IA
2018-10-24 712-412 1XXX2XXX3XXX4XXX5XXX6XXX8XXX · 2 holders which blocks → ONVOY, LLC - IA 221F DOW CITY IA
2018-08-28 712-634 0XXX2XXX4XXX5XXX6XXX9XXX · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - IA 985E CARROLL IA
2018-08-27 712-214 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - IA 221F ASHTON IA
2018-08-27 712-218 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - IA 221F BATTLE CRK IA
2018-08-27 712-306 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 2 holders which blocks → ONVOY, LLC - IA 221F BRUNSVILLE IA
2018-08-27 712-312 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - IA 221F PIERSON IA
2018-08-27 712-315 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - IA 221F STRUBLE IA
2018-08-27 712-316 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → ONVOY, LLC - IA 221F WASHTA IA
2018-08-20 712-717 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - IA 221F SIOUX CITY IA
2018-07-06 712-897 7XXX9XXX · 2 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. - SYSTEMS 1170 AVOCA IA
2018-06-14 712-639 0–9 XXXall 10 · 3 holders which blocks → VONAGE AMERICA LLC 197D SIOUX CITY IA
2018-04-26 712-796 0–9 XXXall 10 · 5 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 COUNCILBLF IA
2018-03-16 712-699 0XXX4XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → T-MOBILE USA, INC. 6529 WALL LAKE IA
2018-03-09 712-381 3XXX7XXX8XXX9XXX · 3 holders which blocks → T-MOBILE USA, INC. 6529 ROCKRAPIDS IA
2018-03-08 712-538 1XXX2XXX4XXX8XXX9XXX · 5 holders which blocks → T-MOBILE USA, INC. 6529 POCAHONTAS IA
2018-03-08 712-798 1XXX2XXX3XXX7XXX8XXX9XXX · 3 holders which blocks → T-MOBILE USA, INC. 6529 GEORGE IA
2018-03-02 712-686 2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → T-MOBILE USA, INC. 6529 SCRANTON IA
2018-02-12 712-509 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 SIOUX CITY IA
2018-02-08 712-481 0–9 XXXall 10 · 6 holders which blocks → AIRUS, INC. - NE 478H SHENANDOAH IA
2018-02-01 712-206 0XXX1XXX2XXX3XXX4XXX7XXX8XXX9XXX · 4 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH 1167 ARMSTRONG IA
2018-01-31 712-280 0XXX1XXX2XXX7XXX8XXX9XXX · 5 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. - SYSTEMS 1170 HARLAN IA
2018-01-22 712-765 0XXX2XXX4XXX6XXX8XXX · 5 holders which blocks → NORTHERN IOWA COMMUNICATIONS PARTNERS, LLC - IA 705H ESTHERVL IA
2017-07-20 712-340 0–9 XXXall 10 · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - IA 985E ATLANTIC IA
2017-02-27 712-888 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → TELNYX LLC 073H BELOIT IA
2016-09-23 712-535 0–9 XXXall 10 · 5 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J SIOUX CITY IA
2016-08-11 712-532 0–9 XXXall 10 · 3 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH 1167 EMMETSBURG IA
2016-07-25 712-205 0XXX1XXX4XXX7XXX8XXX9XXX · 6 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. - SYSTEMS 1170 AUDUBON IA
2016-06-23 712-430 0XXX1XXX2XXX3XXX4XXX7XXX · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 MALVERN IA
2016-03-22 712-530 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → ONVOY, LLC - IA 221F EMERSON IA
2015-12-01 712-201 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - IA 221F UNDERWOOD IA
2015-07-13 712-770 not yet reported which blocks → BTC, INC. - IA 156C GLIDDEN IA
2015-06-25 712-290 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 5 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH 1167 ROCKWELLCY IA
2015-06-25 712-467 4XXX7XXX8XXX9XXX · 4 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH 1167 SIDNEY IA
2015-06-25 712-695 0XXX2XXX4XXX5XXX7XXX9XXX · 6 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH 1167 CLARINDA IA
2015-06-25 712-992 2XXX7XXX9XXX · 3 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH 1167 LOGAN 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.