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Buying a company? Check its telecom before closing.

When you buy a company, you also buy its phone and internet contracts, its circuits and its phone numbers, often with nobody left who knows the details. Here is what to ask for before closing, what can go wrong, and what to do in the first 90 days.

Rings Jonathan and the team 24x7.

8 minRead. Filed under Strategy.
2026Published October 28, 2026.
500+Clients served. 23 years in telecom.

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CIO version

The short version

  • When you buy a company, its telecom contracts, circuits and phone numbers usually come with it. Most of it was set up by people who may not stay after closing.
  • Ask for four things before closing: recent invoices from each provider, the signed contracts, the list of phone numbers, and who holds the admin logins.
  • Whether a contract moves to you, and on what terms, depends on how the deal is structured and on the contract's assignment clause. Your deal attorney decides that part.
  • After closing, cancel nothing until you know what it feeds. Then line up the renewal dates and decide what to combine at each one.
Buying a company? Read its telecom contracts first. Four lists to ask for before closing.

What you inherit at closing

Deal teams look closely at leases, payroll and customer contracts. Phone and internet service tends to get one line in the checklist, if that. Then the deal closes, the seller's office manager or IT person moves on, and the first carrier renewal notice goes to an inbox nobody reads.

Here is what usually comes along with the company:

  • Contracts with time left on them, some set to auto-renew, some with early termination fees.
  • Circuits at each location, sometimes with more than one carrier, and sometimes billed to a site the company left years ago.
  • Phone numbers customers already know, sitting on accounts in the seller's name.
  • Copper lines for fire alarm panels, elevator phones and security systems that are easy to cancel by mistake.
  • Accounts paid on a personal credit card or set up under a former owner's name and email.
  • A phone system, an IT provider or an MSP with its own agreement and its own end date.

None of this should stop a deal. It is a list of things to find before closing, while the people who set them up are still around to answer questions. Our post on why multi-location telecom falls apart shows what happens when nobody does.

Before closing

Four things to ask for before closing

Add these to the diligence request list. They take the seller an afternoon to pull, and they answer most of the questions you will have later.

01

Provider invoices

Recent invoices from each phone, internet, wireless, security and hosting provider, for each location. Invoices show what is actually being billed, including the services nobody remembers ordering.

02

The signed contracts

Each agreement with its amendments and order forms: the term, the end date, the auto-renewal clause, the notice period and the early termination terms. Ask whether any contract says what happens on a change of ownership.

03

The phone number list

Every main number, direct line, toll-free number and fax line, which account each one sits on, and who is listed as the account holder. That is what you need to keep the numbers later.

04

Logins and contacts

Who has the admin login for each carrier portal, the phone system, the firewall and the domain registrar, and whose email gets the carrier notices. Get these moved before people leave.

Contracts and phone numbers: whose name is on them

Two questions decide most of the work after closing: can you keep the contracts you want, and can you keep the phone numbers.

  • Contracts: if you buy the company itself, its contracts usually stay with that company. If you buy only its assets, contracts often have to be assigned to you, and many carrier agreements need the carrier's written consent first. Some contracts also say what happens on a change of ownership. Your deal attorney decides how each one is handled. This post isn't legal advice.
  • Phone numbers: a number belongs to the account it is on. To move it to another carrier later, the account holder has to authorize the port, and the details on the request have to match the carrier's records. Get the account numbers, the PINs and the authority to sign for each account while the seller's team can still help.
  • Logins: if a former employee holds the only admin login to a carrier portal or the phone system, getting it back can take weeks of calls. Ask for it before closing.

If an inherited contract has more time on it than you want, read your real options for getting out early before you call the carrier.

After closing

The first 90 days after closing

The goal in the first three months is simple: nothing breaks, nothing renews by accident, and every account has an owner on your team.

01

Keep everything running

Cancel nothing on day one. Find out what each circuit and line feeds first. Old lines often run alarm panels, elevator phones and card readers that nobody put on a list.

02

Put the accounts in the right name

Update the account holder, billing contact and notice address on every account so renewal notices and outage alerts reach your team, not a former employee.

03

Line up the renewal dates

Put every contract end date and notice deadline on one calendar. Each renewal is a chance to combine, upgrade or move a site to the carrier you already use.

04

Check the safety lines and 911

Confirm the fire panel and elevator lines are still monitored after any change, and that the 911 address on every phone is right for where that phone actually sits.

Combining carriers is usually worth doing, but do it one renewal at a time instead of all at once. Our post on the 90-day renewal window covers how to work each one. Before you cancel an old line, read why your fire panel still needs a line, and check that 911 knows which building each phone is in.

Common questions

Questions we get on the first call

Do the seller's telecom contracts transfer to us automatically?
It depends on how the deal is structured and what each contract says. When you buy the company itself, the contracts usually stay with that company. When you buy only its assets, contracts often have to be assigned, and many carrier agreements require the carrier's consent for that. Your deal attorney makes the call. We help you find every contract so nothing is missed.
Can we keep the acquired company's phone numbers?
Usually, yes, but the numbers belong to the account they are on. To move them to another provider, the account holder has to authorize the port, and the name, address and account number on the request have to match the carrier's records. Get that information, and the authority to sign for that account, before the seller's people leave.
Should we cancel the seller's carriers right away?
No. Leave everything running until you know what each circuit and line does. Old lines often feed alarm panels, elevator phones, card readers or a vendor connection nobody listed. Plan changes around each contract's renewal date and give notice the way the contract requires.
What if the seller has more time left on a contract than we want?
Read the early termination terms and the renewal clause first. Some contracts let you move service to another location, swap it for a different service with the same carrier, or end it at a known cost. Our post on getting out of a contract early covers the options.
Do we still need our IT team or MSP?
Yes. Your IT team or MSP handles the network, the phone system setup and the on-site work. We handle the contracts, the carrier comparison and the ordering, and we chase the carrier when something is wrong.
What does Buckeye charge to help with an acquisition?
The review is part of a normal first call. If you sign with a carrier or provider we bring, the provider pays us a residual and the contract is in your name. Your price is the same as going direct.

Thirty minutes. A list of what came with the deal.

No deck, no discovery engagement, no obligation. You deal with the principal from the first call.

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