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
2001-10-04 856-335 1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 6 holders which blocks → PAETEC ITEL, LLC 829J BERLIN NJ
2001-10-04 856-343 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 4 holders which blocks → PAETEC ITEL, LLC 829J MULLICA HL NJ
2001-10-04 856-404 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 2 holders which blocks → PAETEC ITEL, LLC 829J WILLIAMSTN NJ
2001-10-04 856-462 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 2 holders which blocks → PAETEC ITEL, LLC 829J VINELAND NJ
2001-10-04 856-469 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 4 holders which blocks → PAETEC ITEL, LLC 829J SALEM NJ
2001-10-04 856-497 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 3 holders which blocks → PAETEC ITEL, LLC 829J BRIDGETON NJ
2001-10-04 856-517 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 6 holders which blocks → PAETEC ITEL, LLC 829J PENNSGROVE NJ
2001-10-04 856-530 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 6 holders which blocks → PAETEC ITEL, LLC 829J CEDARVILLE NJ
2001-10-04 856-599 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 5 holders which blocks → PAETEC ITEL, LLC 829J PAULSBORO NJ
2001-10-04 856-624 1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 7 holders which blocks → PAETEC ITEL, LLC 829J WOODSTOWN NJ
2001-10-04 856-628 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 2 holders which blocks → PAETEC ITEL, LLC 829J WOODBURY NJ
2001-10-04 856-671 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 6 holders which blocks → PAETEC ITEL, LLC 829J COLLINGSWD NJ
2001-10-04 856-683 0XXX2XXX3XXX4XXX5XXX · 5 holders which blocks → PAETEC ITEL, LLC 829J PORTNORRIS NJ
2001-10-04 856-702 0XXX1XXX2XXX3XXX4XXX5XXX8XXX9XXX · 3 holders which blocks → PAETEC ITEL, LLC 829J MARLTON NJ
2001-10-04 856-712 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 6 holders which blocks → PAETEC ITEL, LLC 829J ELMER NJ
2001-10-04 856-716 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → PAETEC ITEL, LLC 829J PITMAN NJ
2001-10-04 856-803 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → PAETEC ITEL, LLC 829J SWEDESBORO NJ
2001-10-04 856-822 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 7 holders which blocks → PAETEC ITEL, LLC 829J FRANKLINVL NJ
2001-10-04 856-898 1XXX2XXX3XXX4XXX5XXX6XXX9XXX · 3 holders which blocks → PAETEC ITEL, LLC 829J RIVERSIDE NJ
2001-10-04 856-997 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → PAETEC ITEL, LLC 829J GLASSBORO NJ
2001-10-04 901-601 2XXX3XXX4XXX5XXX8XXX9XXX · 2 holders which blocks → POWERTEL MEMPHIS LICENSES, INC. 7474 MEMPHIS TN
2001-10-04 937-414 1XXX2XXX3XXX4XXX5XXX8XXX9XXX which blocks → T-MOBILE USA, INC. 6529 DAYTON OH
2001-10-03 307-624 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 8 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 DOUGLAS WY
2001-10-03 307-797 7XXX8XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 CASPER WY
2001-10-03 325-939 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - TX 6114 SAN ANGELO TX
2001-10-03 330-230 none assigned yet which blocks → XO OHIO, INC. 7520 MOGADORE OH
2001-10-03 361-542 0XXX2XXX3XXX4XXX5XXX7XXX8XXX · 3 holders which blocks → STPCS JOINT VENTURE, LLC 4290 BEEVILLE TX
2001-10-03 417-547 1XXX5XXX6XXX · 2 holders which blocks → BRIGHTSPEED OF EAST MISSOURI, LLC 1151 MOUNTANGRV MO
2001-10-03 419-519 0–9 XXXall 10 · 9 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 BRYAN OH
2001-10-03 631-897 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 HUNTINGTON NY
2001-10-03 781-709 1XXX2XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 HANOVER MA
2001-10-03 801-386 0–9 XXXall 10 · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - UT 3231 SALT LAKE UT
2001-10-03 808-356 9XXX which blocks → LEVEL 3 TELECOM OF HAWAII, LP - HI 8297 HONOLULU HI
2001-10-03 832-433 0XXX2XXX3XXX4XXX5XXX7XXX8XXX · 2 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 HOUSTON TX
2001-10-03 832-688 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → SOUTHWESTERN BELL 9533 SATSUMA TX
2001-10-03 856-332 3XXX9XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 MILLVILLE NJ
2001-10-03 903-644 0XXX1XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - TX 6114 FAIRFIELD TX
2001-10-03 903-922 9XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 PALESTINE TX
2001-10-02 228-283 0–9 XXXall 10 · 8 holders which blocks → AT&T ENTERPRISES, LLC 516C VANCLEAVE MS
2001-10-02 250-293 not yet reported which blocks → TELUS 8086 Princeton —
2001-10-02 250-550 not yet reported which blocks → TELUS 8086 Vernon —
2001-10-02 250-654 not yet reported which blocks → TELUS 8086 Saanich —
2001-10-02 254-784 1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 HAMILTON TX
2001-10-02 262-339 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 NEWBURG WI
2001-10-02 262-357 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC WI 7216 WEST BEND WI
2001-10-02 336-560 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → PAETEC ITEL, LLC 829J SUMMERFLD NC
2001-10-02 403-801 not yet reported which blocks → TELUS Mobility 8301 Calgary —
2001-10-02 403-826 not yet reported which blocks → TELUS Mobility 8301 Calgary —
2001-10-02 504-994 none assigned yet which blocks → VOICESTREAM GSM I, LLC 150C KENNER LA
2001-10-02 512-289 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 AUSTIN TX

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.