Area code 810 calling hours: can you call now?

Area code 810 serves Flint, Lapeer, and Port Huron in Michigan. It is on Eastern time. Clocks move for daylight saving time in March and November.

Debt collection: federal — Presumed convenient 8 a.m.-9 p.m. local time at the consumer's location, any day. Michigan: All collection communications must be made between 8 a.m. and 9 p.m. unless the debtor agrees in writing to other times, any day.
Telemarketing: federal — 8 a.m.-9 p.m. local time at the called party's location, any day. Michigan: Unsolicited commercial calls may not be received between 9 p.m. and 9 a.m., any day.

Live check: area code 810

Turn on JavaScript for the live check. The rules table below lists every window that applies to 810.

Not checked here: consent, Do-Not-Call lists, Reg F call frequency (7 calls in 7 days), cease-communication requests or attorney representation, reassigned numbers, and whether the consumer has told you a time is inconvenient.

Calling-hour rules for 810

Hours are local time at the person you are calling. When federal and Michigan rules differ, the narrower window governs; the live check applies every row at once.

Rule set	Debt collection	Telemarketing
Federal	Presumed convenient 8 a.m.-9 p.m. local time at the consumer's location, any day. Every day 8:00 a.m.–9:00 p.m. 15 U.S.C. § 1692c(a)(1) · 12 CFR § 1006.6(b)(1)(i) (Regulation F) · Reg F Official Interpretation, comment 6(b)(1)(i)-2 (consumer's location) · 12 CFR § 1006.14(b)(2) Call-frequency presumption: a collector is presumed to comply with the harassment ban if it places no more than 7 calls to a person about a particular debt within 7 consecutive days, and no call within 7 days after a telephone conversation with that person about the debt; exceeding either is presumed a violation (12 CFR § 1006.14(b)(2)). Conflicting location information: if the collector's information indicates the consumer may be in more than one place (e.g. an Eastern-zone area code and a Pacific-zone address), it complies only by calling at a time convenient in all of those locations (Reg F comment 6(b)(1)(i)-2). A collector may not call at any time it knows or should know is inconvenient to the consumer (e.g. after the consumer says so), regardless of the 8 a.m.-9 p.m. default (15 U.S.C. § 1692c(a)(1); Reg F comment 6(b)(1)-1). No federal Sunday or holiday ban, but a consumer's statement that a day or time is inconvenient makes calls then unlawful. The 8-9 window is a default presumption that the consumer's prior consent (given directly to the collector) or a court can override.	8 a.m.-9 p.m. local time at the called party's location, any day. Every day 8:00 a.m.–9:00 p.m. 47 CFR § 64.1200(c)(1) (TCPA rules) · 16 CFR § 310.4(c) (Telemarketing Sales Rule) No telephone solicitation to a number on the National Do Not Call Registry absent an established business relationship or the consumer's signed written permission (47 CFR § 64.1200(c)(2); 16 CFR § 310.4(b)(1)(iii)(B)). Autodialed or artificial/prerecorded-voice telemarketing calls to wireless numbers, and prerecorded telemarketing calls to residential lines, require the called party's prior express written consent (47 CFR § 64.1200(a)(2)-(3)). Sellers must honor company-specific do-not-call requests (47 CFR § 64.1200(d); 16 CFR § 310.4(b)(1)(iii)(A)). TSR § 310.4(c) allows calls outside 8-9 with the person's prior consent; the TCPA time rule in § 64.1200(c)(1) has no consent exception for telephone solicitations as defined.
Michigan	All collection communications must be made between 8 a.m. and 9 p.m. unless the debtor agrees in writing to other times, any day. Every day 8:00 a.m.–9:00 p.m. MCL 339.915(n) · MCL 445.252(n) Calling repeatedly or continuously, or at unusual times or places known to be inconvenient to the debtor, is prohibited (MCL 339.915(n); MCL 445.252(n)). Consent to calls outside 8 a.m.-9 p.m. must be express and in writing (stricter than federal). The statutes do not state whose local time applies; calls 9 p.m.-8 a.m. are presumed inconvenient.	Unsolicited commercial calls may not be received between 9 p.m. and 9 a.m., any day. Every day 9:00 a.m.–9:00 p.m. MCL 750.540e(1)(f) Telephone solicitors must identify themselves and the organization at the start of the call and may not block caller ID (MCL 445.111b). Violation is a misdemeanor under the Michigan Penal Code. The 9 a.m. start also covers charitable solicitations ('contributions').

Debt collection

Telemarketing

Federal

Presumed convenient 8 a.m.-9 p.m. local time at the consumer's location, any day.

Every day 8:00 a.m.–9:00 p.m.

15 U.S.C. § 1692c(a)(1) · 12 CFR § 1006.6(b)(1)(i) (Regulation F) · Reg F Official Interpretation, comment 6(b)(1)(i)-2 (consumer's location) · 12 CFR § 1006.14(b)(2)

Call-frequency presumption: a collector is presumed to comply with the harassment ban if it places no more than 7 calls to a person about a particular debt within 7 consecutive days, and no call within 7 days after a telephone conversation with that person about the debt; exceeding either is presumed a violation (12 CFR § 1006.14(b)(2)).
Conflicting location information: if the collector's information indicates the consumer may be in more than one place (e.g. an Eastern-zone area code and a Pacific-zone address), it complies only by calling at a time convenient in all of those locations (Reg F comment 6(b)(1)(i)-2).
A collector may not call at any time it knows or should know is inconvenient to the consumer (e.g. after the consumer says so), regardless of the 8 a.m.-9 p.m. default (15 U.S.C. § 1692c(a)(1); Reg F comment 6(b)(1)-1).

No federal Sunday or holiday ban, but a consumer's statement that a day or time is inconvenient makes calls then unlawful. The 8-9 window is a default presumption that the consumer's prior consent (given directly to the collector) or a court can override.

8 a.m.-9 p.m. local time at the called party's location, any day.

Every day 8:00 a.m.–9:00 p.m.

47 CFR § 64.1200(c)(1) (TCPA rules) · 16 CFR § 310.4(c) (Telemarketing Sales Rule)

No telephone solicitation to a number on the National Do Not Call Registry absent an established business relationship or the consumer's signed written permission (47 CFR § 64.1200(c)(2); 16 CFR § 310.4(b)(1)(iii)(B)).
Autodialed or artificial/prerecorded-voice telemarketing calls to wireless numbers, and prerecorded telemarketing calls to residential lines, require the called party's prior express written consent (47 CFR § 64.1200(a)(2)-(3)).
Sellers must honor company-specific do-not-call requests (47 CFR § 64.1200(d); 16 CFR § 310.4(b)(1)(iii)(A)).

TSR § 310.4(c) allows calls outside 8-9 with the person's prior consent; the TCPA time rule in § 64.1200(c)(1) has no consent exception for telephone solicitations as defined.

Michigan

All collection communications must be made between 8 a.m. and 9 p.m. unless the debtor agrees in writing to other times, any day.

Every day 8:00 a.m.–9:00 p.m.

MCL 339.915(n) · MCL 445.252(n)

Calling repeatedly or continuously, or at unusual times or places known to be inconvenient to the debtor, is prohibited (MCL 339.915(n); MCL 445.252(n)).

Consent to calls outside 8 a.m.-9 p.m. must be express and in writing (stricter than federal). The statutes do not state whose local time applies; calls 9 p.m.-8 a.m. are presumed inconvenient.

Unsolicited commercial calls may not be received between 9 p.m. and 9 a.m., any day.

Every day 9:00 a.m.–9:00 p.m.

MCL 750.540e(1)(f)

Telephone solicitors must identify themselves and the organization at the start of the call and may not block caller ID (MCL 445.111b).

Violation is a misdemeanor under the Michigan Penal Code. The 9 a.m. start also covers charitable solicitations ('contributions').

Exchanges and time zones

Every assigned exchange in 810 sits in Eastern time, so the area code alone settles the zone for a landline. The 25 largest rate centers by exchange count:

Rate center	Exchanges
Flint, MI	139
Lapeer, MI	44
Port Huron, MI	44
Brighton, MI	39
Grand Blanc, MI	16
Fenton, MI	15
Algonac, MI	11
Davison, MI	11
Sandusky, MI	10
Clio Mount Morris, MI	9
Marine City, MI	9
Imlay City, MI	8
Saint Clair, MI	8
Hartland, MI	7
Southfield, MI	7
Capac, MI	6
Dryden, MI	6
Flushing, MI	6
Lexington, MI	6
Montrose, MI	6
Applegate, MI	5
Carsonville, MI	5
Deckerville, MI	5
Memphis, MI	5
Yale, MI	5

810 has no overlay codes.

Other area codes in Michigan:

231 Muskegon
248 Pontiac
269 Kalamazoo
313 Detroit Zone 05
517 Lansing
586 Mount Clemens
616 Grand Rapids
679
734 Ann Arbor
906 Marquette
947 Ortonville
989 Saginaw

Why area code alone is not enough

Mobile numbers travel with their owners, and a ported number keeps its original 810 area code and exchange. An 810 number tells you where the line was assigned, not where the person is today.
Under Regulation F, when you know of more than one location for a consumer — a mailing address in one zone, an area code in another — the time must be convenient in every one of them. Use the address-state field above to add the zones you know about.
Call only when the window is open in every location you know about, and stop calling at times the consumer tells you are inconvenient, whatever the clock says.

Questions

What time can you call area code 810?

Area code 810 is in Michigan, on Eastern time. Debt collection: federal — Presumed convenient 8 a.m.-9 p.m. local time at the consumer's location, any day. Michigan: All collection communications must be made between 8 a.m. and 9 p.m. unless the debtor agrees in writing to other times, any day. Telemarketing: federal — 8 a.m.-9 p.m. local time at the called party's location, any day. Michigan: Unsolicited commercial calls may not be received between 9 p.m. and 9 a.m., any day.

What time zone is area code 810?

Area code 810 is entirely in Eastern time. Clocks move for daylight saving time in March and November.

Can a debt collector call an 810 number on Sunday?

Sunday is not singled out: Michigan's debt-collection hours are every day 8:00 a.m.–9:00 p.m., and the federal 8 a.m.–9 p.m. window also applies. A consumer can still tell a collector that Sunday is inconvenient.

Is the 810 area code enough to know the person's local time?

No. Mobile numbers move with their owners and ported numbers keep their area code, so an 810 number may belong to someone in another time zone. If you know other locations for the person, the call should fit the window in all of them.

Sources

This page is general information, not legal advice. Laws change and some rules depend on who is calling and why; confirm with counsel. Rules last reviewed 2026-10-07.

Area code 810 calling hours: can you call now?

Live check: area code 810

Calling-hour rules for 810

Exchanges and time zones

Related area codes

Why area code alone is not enough

Questions

What time can you call area code 810?

What time zone is area code 810?

Can a debt collector call an 810 number on Sunday?

Is the 810 area code enough to know the person's local time?

Sources

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