Call Forwarding for Business: Setup, Codes & Smart Routing

Call forwarding sends calls from one number to another — and the version most businesses actually want is conditional forwarding: ring my line first, and only forward when I'm busy, don't answer, or I'm closed. Set up well, forwarding is how a small business guarantees every call reaches something that answers. Here's how it works and the routing recipes worth copying.

The two kinds of forwarding

• Unconditional (forward-all): every call goes straight to the target number; your phone never rings. Use for vacations, a dead phone, or routing a legacy number to a new line.
• Conditional: forwards only on busy, no-answer (after N rings), or unreachable. Your team gets first crack; the safety net catches the rest. This is the setting that kills missed calls without giving up your phone.

Common carrier codes

Exact codes vary by carrier and plan — always confirm with yours — but these are the widely used defaults on US carriers:

Action	Typical code
Forward all calls on	*72 + number (many carriers) or **21*number# (GSM)
Forward all calls off	*73 or ##21#
Forward when busy	*90 + number / **67*number#
Forward when unanswered	*92 + number / **61*number#
Forward when unreachable	**62*number#

VoIP systems skip the codes entirely — forwarding lives in the dashboard, usually under "call handling" or "ring rules," where you can also set schedules.

Routing recipes that work

1. The safety net: conditional-forward busy + no-answer to a number that always answers (a team member, or an AI receptionist). Your phone behaves normally; nothing hits voicemail.
2. The after-hours switch: schedule-based forwarding — office line rings the desk 8–5, forwards everything to the answering line outside those hours. Most VoIP systems automate the schedule.
3. The ring group: ring desk + cell simultaneously (or in sequence), then forward to the answering line if neither picks up within ~4 rings.
4. The overflow valve: forward on busy only — solo operators lose most calls to the second concurrent caller, and this recipe catches exactly those.

Forward to what?

Forwarding only moves the problem unless the destination actually answers. The classic destinations, honestly compared:

• Your cell: free, but now every after-hours call is your problem.
• Voicemail: most callers hang up and dial a competitor — see our voicemail greetings guide for making the best of it.
• A traditional answering service: a human takes a message at $1–$2/minute.
• An AI receptionist: answers in under a second, has the conversation, and books the appointment — the destination that converts instead of collecting messages. Setup is exactly the conditional-forward recipe above and takes about 20 minutes; see the 24/7 answering service.

Frequently asked questions

How do I forward my business phone to another number?

On most carriers, dial *72 followed by the destination number (or **21*number# on GSM carriers), and *73 / ##21# to turn it off. On VoIP systems, set it in the dashboard under call handling. Confirm codes with your carrier.

What is conditional call forwarding?

Forwarding that triggers only in specific cases — line busy, no answer after a set ring count, or phone unreachable — so your own phone always rings first and the forward is a safety net.

Does call forwarding cost anything?

The feature is included in most business plans; forwarded minutes may bill like outbound calls on some carriers. VoIP plans almost always include it flat.

Can I forward calls only after business hours?

Yes — VoIP systems support schedules natively, and carrier lines can approximate it by toggling *72/*73 at open and close (or by using a virtual number in front of your line that handles the schedule).