301-603

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Phone Lookup Top Complaints Area Codes NPA-NXX iMessage

Raw Number	301603
Basic Format	301-603
NPA (Area Code)	301
NXX	603

Call Routing Data

NPA-NXX-X	OCN	Company	Rate Center	Use Type	Assign Date	City	State	Region	Block Effective Date
301-603-0XXX	9212	VERIZON MARYLAND, INC.	WSNGTNZN11	RT		WASHINGTON ZONE 11	MD	MA
301-603-1XXX	9212	VERIZON MARYLAND, INC.	WSNGTNZN11	RT		WASHINGTON ZONE 11	MD	MA
301-603-2XXX	318J	COMCAST IP PHONE, LLC	WSNGTNZN11	AS	06/24/2016	WASHINGTON ZONE 11	MD	MA	07/13/2016
301-603-3XXX	876D	ONVOY, LLC - MD	WSNGTNZN11	AS	05/28/2015	WASHINGTON ZONE 11	MD	MA	06/27/2015
301-603-4XXX	2593	CORE COMMUNICATIONS, INC.- MD	WSNGTNZN11	AS	10/12/2018	WASHINGTON ZONE 11	MD	MA	10/24/2018
301-603-5XXX	964H	BARR TELL USA, INC.	WSNGTNZN11	AS	04/26/2018	WASHINGTON ZONE 11	MD	MA	05/08/2018
301-603-6XXX	2593	CORE COMMUNICATIONS, INC.- MD	WSNGTNZN11	AS	07/12/2019	WASHINGTON ZONE 11	MD	MA	07/30/2019
301-603-7XXX	9212	VERIZON MARYLAND, INC.	WSNGTNZN11	RT		WASHINGTON ZONE 11	MD	MA
301-603-8XXX	9212	VERIZON MARYLAND, INC.	WSNGTNZN11	RT		WASHINGTON ZONE 11	MD	MA
301-603-9XXX	9212	VERIZON MARYLAND, INC.	WSNGTNZN11	RT		WASHINGTON ZONE 11	MD	MA
301-603-XXXX	9212	VERIZON MARYLAND, INC.	WSNGTNZN11	AS		WASHINGTON ZONE 11	MD

Business/Government Phones on the 301-603 Prefix

Phone	Name	Address
301-603-1080	Green Future Construction LLC
301-603-3204	Home Helpers Home Care Of Waldorf, MD
301-603-0088	Dunkin'	13874 Georgia Avenue Silver Spring 20906 US
301-603-0730	Papa John's	13860 Georgia Avenue Aspen Hill 20906 US
301-603-2191	Grocerylanka	10518 Detrick Avenue Kensington 20895 US
301-603-2575	Rising Sun Motors & Tires	12103 Rockville Pike US
301-603-3372	Exclusive Concepts	600 Cady Drive Fort Washington 20744 US
301-603-8001	Michaels	13850 Georgia Avenue Silver Spring 20906-2924 US

Reports

Anonymous User from Accokeek, Maryland

April 29, 2026 at 5:20 PM

301-603-1816 reported as a Live Voice or Other. Received on April 28, 2026 at 11:31 AM.
Call for Medical & prescriptions

Anonymous User from Silver Spring, Maryland

February 19, 2026 at 6:36 AM

301-603-3412 reported as a Live Voice or Other. Received on February 18, 2026 at 5:57 PM.

Anonymous User from Silver Spring, Maryland

February 17, 2026 at 6:01 PM

301-603-3412 reported as a Live Voice or Other. Received on February 17, 2026 at 5:51 PM.

Anonymous User from Silver Spring, Maryland

February 13, 2026 at 1:23 PM

301-603-3412 reported as a Live Voice or Other. Received on February 13, 2026 at 12:50 PM.

Anonymous User from Silver Spring, Maryland

February 12, 2026 at 1:38 PM

301-603-3412 reported as a Live Voice or Other. Received on February 12, 2026 at 11:40 AM.

Anonymous User from Silver Spring, Maryland

January 30, 2026 at 11:13 AM

301-603-3072 reported as a Live Voice or Other. Received on January 30, 2026 at 11:04 AM.

Anonymous User from College Park, Maryland

January 28, 2026 at 12:27 PM

301-603-3861 reported as a Robocall. Received on January 28, 2026 at 12:02 PM.
Call for Medical & prescriptions

Anonymous User from , MD

December 16, 2025 at 11:16 AM

301-603-6958 reported as a Live Voice or Other. Received on December 16, 2025 at 10:50 AM.
Call for Dropped call or no message

Anonymous User from Damascus, Maryland

December 2, 2025 at 10:44 AM

301-603-2731 reported as a Robocall. Received on December 2, 2025 at 10:40 AM.

Anonymous User from , MD

November 17, 2025 at 3:47 PM

301-603-3972 reported as a Robocall. Received on November 17, 2025 at 2:23 PM.
Call for Dropped call or no message

Anonymous User from , MD

September 22, 2025 at 12:34 PM

301-603-6279 reported as a Robocall. Received on September 22, 2025 at 12:30 PM.

Anonymous User from , MD

July 28, 2025 at 11:18 AM

301-603-9587 reported as a unwanted call. Received on July 24, 2025 at 11:12 AM.
Call for Calls pretending to be government, businesses, or family and friends

Anonymous User from Swanton, Maryland

May 26, 2025 at 5:29 PM

301-603-4369 reported as a Robocall. Received on May 26, 2025 at 5:24 PM.
Call for Medical & prescriptions

Anonymous User from Fort Washington, Maryland

May 17, 2025 at 2:08 PM

301-603-2906 reported as a Robocall. Received on May 17, 2025 at 1:46 PM.

Anonymous User from , MD

April 25, 2025 at 2:14 PM

301-603-0346 reported as a Robocall. Received on April 25, 2025 at 9:09 AM.
Call for No Subject Provided

Anonymous User from Rockville, Maryland

March 25, 2025 at 12:41 PM

301-603-3171 reported as a Robocall. Received on March 17, 2025 at 2:07 PM.

Anonymous User from Rockville, Maryland

March 25, 2025 at 12:39 PM

301-603-7523 reported as a Robocall. Received on March 14, 2025 at 2:37 PM.

Anonymous User from Laurel, Maryland

March 11, 2025 at 3:49 PM

301-603-1988 reported as a Live Voice or Other. Received on March 11, 2025 at 3:46 PM.

Anonymous User from Mesa, Maryland

February 17, 2025 at 11:55 AM

301-603-1807 reported as a Robocall. Received on February 11, 2025 at 12:53 PM.

Anonymous User from Smithsburg, Maryland

January 16, 2025 at 12:18 PM

301-603-2968 reported as a Robocall. Received on January 16, 2025 at 12:17 PM.
Call for Medical & prescriptions

Anonymous User from Bethesda, Maryland

January 10, 2025 at 12:42 PM

301-603-4305 reported as a Live Voice or Other. Received on January 10, 2025 at 9:48 AM.
Call for Vacation & timeshares

Anonymous User from Rockville, Maryland

December 16, 2024 at 3:32 PM

301-603-7835 reported as a Live Voice or Other. Received on December 16, 2024 at 3:30 PM.
Call for Medical & prescriptions

Anonymous User from Rockville, Maryland

August 20, 2024 at 11:17 AM

30160305230 reported as a Live Voice or Other. Received on August 20, 2024 at 11:15 AM.
Call for Charities

Anonymous User from , IL

April 29, 2024 at 5:29 PM

301-603-3864 reported as a unwanted call. Received on April 29, 2024 at 12:00 AM.
Call for No Subject Provided

Anonymous User from , IL

April 25, 2024 at 2:44 PM

301-603-3864 reported as a unwanted call. Received on April 25, 2024 at 12:00 AM.
Call for No Subject Provided

Anonymous User from Jessup, Maryland

March 6, 2024 at 8:26 AM

301-603-4652 reported as a Robocall. Received on March 6, 2024 at 8:22 AM.
Call for Medical & prescriptions

Anonymous User from Smithsburg, Maryland

November 1, 2023 at 1:01 PM

301-603-1680 reported as a Live Voice or Other. Received on November 1, 2023 at 1:00 PM.
Call for Dropped call or no message

Anonymous User from Smithsburg, Maryland

October 24, 2023 at 6:52 PM

301-603-3452 reported as a Robocall. Received on October 24, 2023 at 6:50 PM.

Anonymous User from Frederick, Maryland

March 21, 2023 at 4:30 PM

301-603-5385 reported as a Robocall. Received on March 21, 2023 at 4:22 PM.
Call for Calls pretending to be government, businesses, or family and friends

Anonymous User from Gaithersburg, Maryland

October 18, 2022 at 9:05 PM

301-603-0180 reported as a Robocall. Received on October 17, 2022 at 10:35 AM.

Anonymous User from , MD

September 22, 2022 at 10:09 AM

301-603-3967 reported as a Robocall. Received on September 21, 2022 at 4:52 PM.
Call for Dropped call or no message

Anonymous User from , MD

August 9, 2022 at 3:10 PM

301-603-5593 reported as a Robocall. Received on August 9, 2022 at 3:08 PM.
Call for Warranties & protection plans

Anonymous User from N. Bethesda, Maryland

July 25, 2022 at 3:03 PM

301-603-2410 reported as a Live Voice or Other. Received on July 25, 2022 at 2:50 AM.
Call for Reducing your debt (credit cards, mortgage, student loans)

Anonymous User from Silver Spring, MD

June 18, 2021 at 3:57 AM

315-232-8257 reported as a Prerecorded Voice. Received on June 18, 2021 at 4:49 PM.
Unwanted call for unknown
Caller ID indicated they called from 301-603-9254
Contacted via Wired

Anonymous User from , MD

July 7, 2016 at 7:57 PM

reported as a Abandoned Calls. Received on July 7, 2016 at 2:40 PM.
Telemarketing (including do not call and spoofing) for unknown
Caller ID indicated they called from 301-603-0200
Contacted via Wired

Anonymous User from , MD

February 11, 2015 at 6:43 PM

reported as a Prerecorded Voice. Received on February 11, 2015 at 12:32 PM.
Robocall for unknown
Caller ID indicated they called from 301-603-0840
Contacted via Wireless (cell phone/other mobile device)

Anonymous User from , MD

December 31, 2014 at 9:42 PM

reported as a Prerecorded Voice. Received on December 31, 2014 at 3:11 PM.
Telemarketing (including do not call and spoofing) for unknown
Caller ID indicated they called from 301-603-1515
Contacted via Wired

Most 'popular' numbers on this prefix:

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301-603-1XXX: 301-603-1000 | 301-603-1010 | 301-603-1011 | 301-603-1015 | 301-603-1300 | 301-603-1301 | 301-603-1305 | 301-603-1308 | 301-603-1390 | 301-603-1392 | 301-603-1394 | 301-603-1500 | 301-603-1510 | 301-603-1511 | 301-603-1515 | 301-603-1547 | 301-603-1562 | 301-603-1600 | 301-603-1662 | 301-603-1681 | 301-603-1682 | 301-603-1688 | 301-603-1800 | 301-603-1803 | 301-603-1808 |
301-603-2XXX: 301-603-2142 | 301-603-2149 | 301-603-2188 | 301-603-2196 | 301-603-2197 | 301-603-2198 | 301-603-2400 | 301-603-2411 | 301-603-2414 | 301-603-2417 | 301-603-2447 | 301-603-2491 | 301-603-2900 | 301-603-2960 | 301-603-2962 | 301-603-2969 | 301-603-2992 | 301-603-2998 |
301-603-3XXX: 301-603-3170 | 301-603-3172 | 301-603-3175 | 301-603-3196 | 301-603-3197 | 301-603-3198 | 301-603-3200 | 301-603-3203 | 301-603-3208 | 301-603-3258 | 301-603-3443 | 301-603-3449 | 301-603-3452 | 301-603-3453 | 301-603-3455 | 301-603-3456 | 301-603-3800 | 301-603-3860 | 301-603-3862 | 301-603-3869 | 301-603-3900 | 301-603-3939 | 301-603-3960 | 301-603-3962 | 301-603-3969 | 301-603-3998 |
301-603-4XXX: 301-603-4300 | 301-603-4301 | 301-603-4303 | 301-603-4343 | 301-603-4349 |
301-603-5XXX: 301-603-5380 | 301-603-5385 | 301-603-5387 |
301-603-7XXX: 301-603-7833 | 301-603-7836 | 301-603-7839 | 301-603-7883 | 301-603-7887 | 301-603-7889 |
301-603-9XXX: 301-603-9252 | 301-603-9255 | 301-603-9258 | 301-603-9620 | 301-603-9622 | 301-603-9625 | 301-603-9692 | 301-603-9696 | 301-603-9697 |