NumberResearch Membership · Data 10/01/2026

Recent prefix assignments

374 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 10/01/2026

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
Rogers Communications Canada Inc. (Wireless) 46
8X8, INC. 43
NEW CINGULAR WIRELESS PCS, LLC - DC 28
NEW CINGULAR WIRELESS PCS, LLC - IL 23
ONVOY, LLC - CA 19
New assignments by month Oct 2026 Sep 2026 Aug 2026 Jul 2026 Jun 2026 May 2026 Apr 2026 Mar 2026 Feb 2026 Jan 2026 Dec 2025 Nov 2025
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Quick find in this area code:
Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
— 509-948 none assigned yet which blocks → UNITED STATES CELLULAR - WA 6270 KENNEWICK WA
— 509-949 none assigned yet which blocks → UNITED STATES CELLULAR - WA 6270 YAKIMA WA
— 509-950 not yet reported which blocks → WA
— 509-951 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SPOKANE WA
— 509-952 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 YAKIMA WA
— 509-953 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SPOKANE WA
— 509-954 4XXX5XXX6XXX8XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SPOKANE WA
— 509-958 not yet reported which blocks → WA
— 509-959 not yet reported which blocks → WA
— 509-961 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 YAKIMA WA
— 509-962 not yet reported which blocks → CONSOLIDATED COMMUNICATIONS OF WASHINGTON COMPANY 2412 ELLENSBURG WA
— 509-963 not yet reported which blocks → CONSOLIDATED COMMUNICATIONS OF WASHINGTON COMPANY 2412 ELLENSBURG WA
— 509-964 1XXX3XXX4XXX5XXX6XXX8XXX which blocks → CONSOLIDATED COMMUNICATIONS OF WASHINGTON COMPANY 2412 ELLENSBURG WA
— 509-965 not yet reported which blocks → QWEST CORPORATION 9638 YAKIMA WA
— 509-966 not yet reported which blocks → QWEST CORPORATION 9638 YAKIMA WA
— 509-967 not yet reported which blocks → ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 4324 RICHLAND WA
— 509-968 1XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → CONSOLIDATED COMMUNICATIONS OF WASHINGTON COMPANY 2412 ELLENSBURG WA
— 509-969 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 YAKIMA WA
— 509-972 6XXX which blocks → QWEST CORPORATION 9638 YAKIMA WA
— 509-973 1XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → UNITED TELEPHONE - NORTHWEST DBA CENTURYLINK - WA 4521 WHITSTRAN WA
— 509-976 not yet reported which blocks → WA
— 509-979 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SPOKANE WA
— 509-980 1XXX2XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - WA 6121 CONNELL WA
— 509-981 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SPOKANE WA
— 509-982 1XXX6XXX7XXX8XXX · 2 holders which blocks → CENTURYTEL OF WASHINGTON, INC. DBA CENTURYLINK 2408 ODESSA WA
— 509-984 none assigned yet which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SPOKANE WA
— 509-985 none assigned yet which blocks → UNITED STATES CELLULAR - WA 6270 YAKIMA WA
— 509-987 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → UNITED STATES CELLULAR - WA 6270 KENNEWICK WA
— 509-988 1XXX3XXX7XXX8XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 ODESSA WA
— 509-989 8XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 MOSES LAKE WA
— 509-990 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SPOKANE WA
— 509-991 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SPOKANE WA
— 509-992 0–9 XXXall 10 · 3 holders which blocks → TELNYX LLC 073H SPOKANE WA
— 509-993 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SPOKANE WA
— 509-994 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SPOKANE WA
— 509-995 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SPOKANE WA
— 509-996 0XXX1XXX5XXX6XXX7XXX · 4 holders which blocks → CENTURYTEL OF WASHINGTON, INC. DBA CENTURYLINK 2408 TWISP WA
— 509-997 8XXX which blocks → CENTURYTEL OF WASHINGTON, INC. DBA CENTURYLINK 2408 TWISP WA
— 509-998 5XXX8XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SPOKANE WA
— 509-999 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SPOKANE WA
— 510-202 not yet reported which blocks → UTILITY TELECOM GROUP, LLC - CA 9262 OKLD MN-PD CA
— 510-204 not yet reported which blocks → PACIFIC BELL 9740 OKLD BKLY CA
— 510-205 none assigned yet which blocks → METROPCS, INC. 5562 OKLD ALMD CA
— 510-206 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 OKLD MN-PD CA
— 510-207 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 OKLD MN-PD CA
— 510-208 not yet reported which blocks → PACIFIC BELL 9740 OKLD MN-PD CA
— 510-209 none assigned yet which blocks → METROPCS, INC. 5562 HAYWARD CA
— 510-211 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX CA
— 510-212 not yet reported which blocks → SPOK, INC. 6630 FRNK OLIVR CA
— 510-214 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 7240 OKLD ALMD CA

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 10/01/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.