231-821

You are reviewing the Area Code (NPA/NXX) report for 231-821. Did you mean to search the SMS short code 231821?

North American Phone Intelligence

Search a phone number, area code, exchange, or short code

Paste raw digits, a formatted phone number, an area code, an NPA-NXX block, or a short code. US and Canada phone lookups route automatically, and international iMessage checks are available separately.

Phone Lookup Top Complaints Area Codes NPA-NXX iMessage

Raw Number	231821
Basic Format	231-821
NPA (Area Code)	231
NXX	821

Call Routing Data

NPA-NXX-X	OCN	Company	Rate Center	Use Type	Assign Date	State	Region	Block Effective Date
231-821-0XXX	0695	FRONTIER NORTH, INC. - MI	HOLTON	RT		MI	MW
231-821-1XXX	0695	FRONTIER NORTH, INC. - MI	HOLTON	RT		MI	MW
231-821-2XXX	0695	FRONTIER NORTH, INC. - MI	HOLTON	RT		MI	MW
231-821-3XXX	6120	LEVEL 3 COMMUNICATIONS, LLC - MI	HOLTON	AS	10/14/2004	MI	MW	11/12/2004
231-821-4XXX	3535	ACD TELECOM, INC. - MI	HOLTON	AS	01/12/2005	MI	MW	02/11/2005
231-821-5XXX	6120	LEVEL 3 COMMUNICATIONS, LLC - MI	HOLTON	AS	12/15/2005	MI	MW	01/14/2006
231-821-6XXX	543C	ONVOY, LLCV - MI	HOLTON	AS	02/19/2013	MI	MW	03/18/2013
231-821-7XXX	318J	COMCAST IP PHONE, LLC	HOLTON	AS	05/08/2007	MI	MW	06/08/2007
231-821-8XXX	508J	CENTURYLINK COMMUNICATIONS, LLC	HOLTON	AS	08/12/2015	MI	MW	09/15/2015
231-821-9XXX	0695	FRONTIER NORTH, INC. - MI	HOLTON	RT		MI	MW
231-821-XXXX	0695	FRONTIER NORTH, INC. - MI	HOLTON	AS		MI

Business/Government Phones on the 231-821 Prefix

Phone	Name	Address
231-821-9401	M. Miller & Sons Roofing
231-821-0268	Muskegon Area District Library Holton Branch	8776 Holton-Duck Lake Road Holton 49425 US
231-821-1725	Holton Middle/High School	6477 Syers Rd, Holton, MI 49425 US
231-821-1825	Holton Elementary School	6425 Syers Road, Holton 49425 US
231-821-9991	The Pizza Mill	8485 Holton Rd a, Holton, MI 49425 US

Reports

Anonymous User from , MI

March 13, 2026 at 11:30 AM

2318218213703 reported as a Robocall. Received on March 13, 2026 at 11:25 AM.

Anonymous User from Manton Mi, Michigan

February 28, 2026 at 7:41 AM

231-821-0903 reported as a Robocall. Received on February 27, 2026 at 5:16 PM.
Call for No Subject Provided

Anonymous User from , MI

February 19, 2026 at 6:21 PM

231-821-3497 reported as a Robocall. Received on February 19, 2026 at 9:12 AM.

Anonymous User from Cadillac, Michigan

December 8, 2025 at 7:08 PM

231-821-4989 reported as a Robocall. Received on December 4, 2025 at 6:04 PM.

Anonymous User from Wolverine, Michigan

November 29, 2025 at 1:48 PM

231-821-7057 reported as a Robocall. Received on November 29, 2025 at 1:42 PM.
Call for Medical & prescriptions

Anonymous User from Ravenna, Michigan

November 18, 2025 at 11:29 AM

231-821-5027 reported as a unwanted call. Received on November 18, 2025 at 11:26 AM.
Call for No Subject Provided

Anonymous User from Wolverine, Michigan

November 13, 2025 at 10:01 PM

231-821-3862 reported as a unwanted call. Received on October 29, 2025 at 1:54 PM.

Anonymous User from , MI

September 25, 2025 at 11:11 AM

231-821-1802 reported as a Live Voice or Other. Received on September 24, 2025 at 9:41 AM.
Call for Medical & prescriptions

Anonymous User from Mackinaw City, Michigan

July 23, 2025 at 9:31 AM

231-821-7423 reported as a Live Voice or Other. Received on July 22, 2025 at 12:00 PM.
Call for Calls pretending to be government, businesses, or family and friends

Anonymous User from Newaygo, Michigan

May 21, 2025 at 10:35 AM

231-821-3653 reported as a Live Voice or Other. Received on May 21, 2025 at 8:00 AM.

Anonymous User from Big Rapids, Michigan

March 17, 2025 at 5:17 PM

231-821-5674 reported as a Live Voice or Other. Received on March 17, 2025 at 3:55 PM.

Anonymous User from , MI

January 29, 2025 at 3:05 PM

231-821-9608 reported as a Robocall. Received on January 28, 2025 at 9:45 AM.

Anonymous User from Reed City, Michigan

January 10, 2025 at 12:48 PM

231-821-5674 reported as a Robocall. Received on January 10, 2025 at 9:57 AM.

Anonymous User from Sparta, Michigan

July 25, 2024 at 3:16 PM

231-821-9067 reported as a Live Voice or Other. Received on July 25, 2024 at 10:33 AM.
Call for Dropped call or no message

Anonymous User from Cass City, Michigan

April 3, 2024 at 7:51 PM

231-821-7262 reported as a unwanted call. Received on April 2, 2024 at 9:37 AM.
Call for Dropped call or no message

Anonymous User from , MI

March 11, 2024 at 3:36 PM

231-821-4756 reported as a Robocall. Received on March 11, 2024 at 3:29 PM.

Anonymous User from , MO

December 14, 2023 at 12:59 PM

231-821-9970 reported as a Live Voice or Other. Received on December 14, 2023 at 11:55 AM.
Call for No Subject Provided

Anonymous User from Traverse City, Michigan

December 14, 2023 at 10:46 AM

231-821-3842 reported as a Live Voice or Other. Received on December 14, 2023 at 9:54 AM.
Call for Dropped call or no message

Anonymous User from Hope, Michigan

November 15, 2023 at 9:42 AM

231-821-5726 reported as a Robocall. Received on November 15, 2023 at 9:06 AM.
Call for Medical & prescriptions

Anonymous User from , MI

May 11, 2023 at 9:22 AM

231-821-2726 reported as a Robocall. Received on May 10, 2023 at 7:27 PM.

Anonymous User from , MI

May 11, 2023 at 9:20 AM

231-821-2726 reported as a Robocall. Received on May 11, 2023 at 9:18 AM.

Anonymous User from Nuncia, Michigan

April 7, 2023 at 5:44 PM

231-821-7114 reported as a unwanted call. Received on April 7, 2023 at 12:00 AM.

Anonymous User from , MI

March 28, 2023 at 6:24 PM

231-821-0145 reported as a Live Voice or Other. Received on March 28, 2023 at 4:30 PM.

Anonymous User from , MI

March 28, 2023 at 6:21 PM

231-821-0145 reported as a unwanted call. Received on March 28, 2023 at 12:00 AM.

Anonymous User from , MI

November 14, 2022 at 4:21 PM

231-821-0308 reported as a Live Voice or Other. Received on November 14, 2022 at 1:06 PM.
Call for No Subject Provided

Anonymous User from Frankfort, Michigan

September 9, 2022 at 3:00 PM

231-821-6584 reported as a Robocall. Received on September 8, 2022 at 7:50 PM.
Call for Dropped call or no message

Anonymous User from , CA

July 30, 2022 at 9:39 PM

231-821-8780 reported as a Robocall. Received on July 30, 2022 at 5:31 PM.

Anonymous User from Cordova, Tennessee

June 29, 2022 at 11:42 AM

231-821-0107 reported as a Robocall. Received on June 29, 2022 at 9:50 AM.
Call for Reducing your debt (credit cards, mortgage, student loans)

Most 'popular' numbers on this prefix:

231-821-0XXX: 231-821-0000 | 231-821-0010 | 231-821-0020 | 231-821-0080 | 231-821-0081 | 231-821-0088 | 231-821-0100 | 231-821-0101 | 231-821-0102 | 231-821-0158 | 231-821-0198 | 231-821-0221 | 231-821-0270 | 231-821-0273 | 231-821-0277 | 231-821-0278 | 231-821-0290 | 231-821-0292 | 231-821-0299 | 231-821-0300 | 231-821-0305 | 231-821-0500 | 231-821-0540 | 231-821-0550 | 231-821-0800 | 231-821-0801 | 231-821-0808 | 231-821-0810 | 231-821-0811 | 231-821-0815 | 231-821-0901 | 231-821-0930 | 231-821-0936 | 231-821-0937 | 231-821-0938 | 231-821-0944 | 231-821-0947 | 231-821-0948 | 231-821-0965 |
231-821-2XXX: 231-821-2160 | 231-821-2166 | 231-821-2169 | 231-821-2188 | 231-821-2196 | 231-821-2198 | 231-821-2700 | 231-821-2720 | 231-821-2721 | 231-821-2722 | 231-821-2777 | 231-821-2900 | 231-821-2940 | 231-821-2945 | 231-821-2947 | 231-821-2992 | 231-821-2998 |
231-821-3XXX: 231-821-3800 | 231-821-3840 | 231-821-3850 | 231-821-3888 |
231-821-4XXX: 231-821-4700 | 231-821-4750 | 231-821-4755 | 231-821-4777 |
231-821-5XXX: 231-821-5600 | 231-821-5650 | 231-821-5670 | 231-821-5700 | 231-821-5720 | 231-821-5721 | 231-821-5725 | 231-821-5777 |
231-821-6XXX: 231-821-6500 | 231-821-6501 | 231-821-6550 | 231-821-6580 | 231-821-6581 | 231-821-6583 |
231-821-7XXX: 231-821-7100 | 231-821-7105 | 231-821-7107 | 231-821-7110 | 231-821-7111 | 231-821-7117 |
231-821-8XXX: 231-821-8700 | 231-821-8777 | 231-821-8780 | 231-821-8788 |
231-821-9XXX: 231-821-9000 | 231-821-9010 | 231-821-9020 | 231-821-9060 | 231-821-9062 | 231-821-9065 | 231-821-9200 | 231-821-9201 | 231-821-9209 | 231-821-9220 | 231-821-9250 | 231-821-9400 | 231-821-9401 | 231-821-9409 | 231-821-9450 | 231-821-9600 | 231-821-9601 | 231-821-9606 | 231-821-9650 | 231-821-9660 | 231-821-9900 | 231-821-9977 | 231-821-9978 | 231-821-9979 | 231-821-9990 |