A service contract does not move with its owner the way a phone number does. It is written against a particular state's rules, sold by a seller that operates under a particular statute or program, and read by whatever regulator covers that seller. When the owner changes state, each of those links may change, and the owner should check them before the move rather than after.
Why the state of sale still matters
Many contracts name a governing law and cite the statute or program under which the seller operates. The state named on the paper is the reference point. The state where you now live may have its own roster, its own rules, or no roster at all. A move does not automatically settle which set of rules a dispute will be measured against, so the contract's own wording is the first thing to read.
Find the governing-law and address clauses
Look for the clause naming governing law, the clause on the owner's address and how changes of address are reported, and any clause on the contract's territory, meaning where covered service is performed. Note whether coverage depends on the unit or the home staying in one place, and whether a move ends the term, suspends it, or leaves it untouched.
Ask the provider in writing
Before the move, ask whether the contract stays in force at the new address, whether the territory changes, whether service is available in the new location, and what notice the provider requires. Ask for the answers in writing. A spoken assurance at a counter is not a record, and a written answer can be read back later.
Check the new state's page
Look up the new state on this site. The state page gives the regulator, the statute or program, whether a roster is published, and the as-of date of the printed roster. Use that as a reading list, not as a conclusion about the contract. Where this edition has not read a state, the page says so, and the regulator's own site is the next place to check.
Compare the old paper with any new paper
If you buy a new contract after the move, keep the old one and compare the two using the same questions. Do not assume a transferred contract carries the same terms as a new one, and do not assume a new contract keeps the protections of the old one. The point of the comparison is to see what changed, line by line.
Keep both records together
Store the old contract, the notice of the move, and any reply from the provider in one folder. If the old terms matter later, that folder shows what the paper said and what the provider was told at the time.