NumberResearch Membership · Data 09/23/2026

Recent prefix assignments

338 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/23/2026

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. 39
ONVOY, LLC - CA 27
NEW CINGULAR WIRELESS PCS, LLC - IL 27
NEW CINGULAR WIRELESS PCS, LLC - DC 26
ONVOY, LLC - NJ 15
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
2004-06-21 778-999 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Vancouver —
2004-06-18 262-200 0–9 XXXall 10 · 6 holders which blocks → WISCONSIN BELL INC 9327 OCONOMOWOC WI
2004-06-18 843-513 0–9 XXXall 10 · 3 holders which blocks → SOUTH CAROLINA NET, INC. - SC 1784 CHARLESTON SC
2004-06-18 864-517 0–9 XXXall 10 · 3 holders which blocks → SOUTH CAROLINA NET, INC. - SC 1784 GREENVILLE SC
2004-06-17 218-358 none assigned yet which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MN 5816 LENGBY MN
2004-06-17 224-265 0–9 XXXall 10 · 5 holders which blocks → FIRST COMMUNICATIONS, LLC 460K ELK GROVE IL
2004-06-17 309-319 0–9 XXXall 10 · 5 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL 7196 BLOOMINGTN IL
2004-06-17 608-333 0–9 XXXall 10 · 2 holders which blocks → TDS METROCOM, LLC 520K MADISON WI
2004-06-17 765-233 0–9 XXXall 10 · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IN 4803 ALEXANDRIA IN
2004-06-17 806-332 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 3 holders which blocks → T-MOBILE USA, INC. 6529 LAMESA TX
2004-06-17 806-369 1XXX3XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 DIMMITT TX
2004-06-16 208-295 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - ID 689F BONERSFRRY ID
2004-06-16 208-822 0–9 XXXwhole prefix which blocks → QWEST CORPORATION 9636 BOISE ID
2004-06-16 434-236 2XXX9XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - VA 8825 BROOKNEAL VA
2004-06-16 434-253 0–9 XXXall 10 · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - VA 8825 LA CROSSE VA
2004-06-16 507-489 0XXX1XXX2XXX7XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MN 5256 WALDORF MN
2004-06-16 615-388 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 6673 LAFAYETTE TN
2004-06-16 651-327 0XXX1XXX2XXX3XXX5XXX6XXX7XXX9XXX · 6 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 RED WING MN
2004-06-16 785-310 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - KS 2240 LYNDON KS
2004-06-16 815-508 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 DE KALB IL
2004-06-16 901-239 0–9 XXXall 10 · 3 holders which blocks → POWERTEL MEMPHIS LICENSES, INC. 7474 MEMPHIS TN
2004-06-15 205-377 0–9 XXXall 10 · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - AL 5255 YORK AL
2004-06-15 218-344 1XXX2XXX3XXX4XXX8XXX · 4 holders which blocks → ONVOY, LLC - MN 184D PARKRAPIDS MN
2004-06-15 256-557 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AL 6804 CROSSVILLE AL
2004-06-15 479-242 not yet reported which blocks → VANTAGE TELECOM, LLC DBA NEWROADS TELECOM - AR 5018 FORT SMITH AR
2004-06-15 787-676 0–9 XXXall 10 · 2 holders which blocks → SUNCOM DBA T-MOBILE USA 8645 HUMACAO PR
2004-06-15 815-281 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → UNITED STATES CELLULAR - IL 6265 GALENA IL
2004-06-15 843-519 not yet reported which blocks → SOUTH CAROLINA NET, INC. - SC 1784 FLORENCE SC
2004-06-14 352-269 1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - FL 4802 WEIRSDALE FL
2004-06-14 403-525 not yet reported which blocks → TELUS 8084 Medicine Hat —
2004-06-14 509-320 0XXX2XXX3XXX4XXX7XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - WA 6121 STARBUCK WA
2004-06-14 807-621 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Thunder Bay —
2004-06-14 845-610 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NY 4006 CHESTER NY
2004-06-14 845-614 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NY 4006 WASHIGTNVL NY
2004-06-14 850-333 5XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 DFUNIAKSPG FL
2004-06-14 989-244 0–9 XXXall 10 · 7 holders which blocks → PAETEC ITEL, LLC 829J BIRCH RUN MI
2004-06-11 520-662 0–9 XXXwhole prefix which blocks → QWEST CORPORATION 9636 TUCSON AZ
2004-06-11 617-447 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BOSTON MA
2004-06-11 678-200 0–9 XXXall 10 · 2 holders which blocks → POWERTEL ATLANTA LICENSES, INC. 7473 GAINESVL GA
2004-06-10 512-883 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → PEERLESS NETWORK OF TEXAS, LLC - TX 177F JARRELL TX
2004-06-10 608-410 1XXX4XXX7XXX · 3 holders which blocks → MID-PLAINS TEL., INC. 0881 MIDDLETON WI
2004-06-10 701-494 1XXX4XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - ND 6568 HAZEN ND
2004-06-10 763-322 0–9 XXXwhole prefix which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 TWINCITIES MN
2004-06-10 763-431 0–9 XXXwhole prefix which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 TWINCITIES MN
2004-06-10 774-293 0–9 XXXall 10 · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 GRAFTON MA
2004-06-09 352-508 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - FL 4802 TAVARES FL
2004-06-09 540-237 0XXX1XXX2XXX3XXX4XXX6XXX7XXX · 6 holders which blocks → COMCAST IP PHONE, LLC 318J BRIDGEWTR VA
2004-06-09 586-218 0–9 XXXall 10 · 8 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 ROSEVILLE MI
2004-06-09 660-605 4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO 5814 GALLATIN MO
2004-06-09 773-387 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 CHICGOZN10 IL

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/23/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.