Landline scrub: how to screen a phone list before you text aged insurance leads

96% mobile isn't 100% mobile

Phone-validated aged data is sold as mostly mobile because that's what it is — a properly sourced list runs in the high nineties, not perfect. The gap is small in percentage terms and easy to ignore on a spreadsheet, but it isn't small in absolute numbers once you're texting real volume. On a batch of 10,000 records, even a 96% mobile rate leaves roughly 400 numbers that aren't wireless. Call that list "texting-ready" without a separate phone-type pass and you're sending SMS to several hundred numbers that were never going to receive it.

How landlines end up in a purchased list in the first place

Phone data doesn't stay static after it's captured. Numbers get ported between carriers, households switch from a wireless-first plan to a bundled landline, VoIP lines blur the line between "mobile" and "landline" in ways a validation pass at data-capture time doesn't always catch, and area-code and exchange assignments shift over time. A record can validate as mobile the day it's captured and still drift by the time you buy and work it 30–90 days later. That drift is exactly why a phone-type check belongs at your end of the pipeline, right before you send — not something you trust to have been solved permanently upstream.

What texting a landline actually costs you

• The message never arrives. A landline that isn't VoIP-based can't receive SMS at all — that portion of your send is pure waste, counted in your outbound volume but generating zero chance of a reply.
• Carrier filtering gets more aggressive. A campaign with a high rate of failed or undeliverable sends looks worse to carrier spam-filtering systems than a clean one, which can drag down delivery on the messages that would have landed.
• 10DLC throughput and vetting take the hit. Your registered campaign's vetting score and per-message throughput are shaped in part by delivery and complaint signals over time. A pattern of sends to non-wireless numbers is the kind of noise that works against you when your provider reviews the campaign, on top of the wasted per-segment cost of every message that bounces.
• Your reply-rate math gets skewed. If you're tracking cost per contact the way the batch-tracking spreadsheet recommends, undeliverable sends inflate your denominator and understate how well the list actually performed with the people who could receive it.

Where the check fits in your pipeline

Run it as the same pass as your DNC scrub, not a separate step you might skip when you're in a hurry. The DNC scrubbing walkthrough covers dedupe, national and state registry checks, and litigator-list screening — a phone-type check slots in right alongside those, since most scrub tools run it in the same upload:

1. Dedupe the file so you're not paying to check the same number twice.
2. Run the DNC scrub — national registry, state lists for any two-list states in your pull, and litigator screening.
3. Run the phone-type check in the same pass. This flags landlines and disconnected numbers so they're excluded from your texting segment before your 10DLC campaign ever touches them.
4. Split the output. Numbers that clear both checks go to your texting queue. Landlines that are otherwise DNC-clear can still go to a calling queue if you're working the list by phone as well as by text — a landline just can't receive SMS, it isn't automatically off-limits for a call.
5. Register and send. 10DLC registration governs whether your texts get delivered at all; it doesn't replace the phone-type check, and neither replaces the other.

DIY lookups vs a dedicated scrubber

You can check phone type manually in small batches through a handful of free or low-cost lookup tools, but that doesn't scale past a few hundred numbers without turning into a part-time job. For a real batch, a dedicated scrubber that bundles DNC, litigator, and phone-type checks into one upload is the practical choice — you get a clean file back instead of three separate reports to reconcile by hand. The one we point buyers at is Landline Remover — upload the CSV and it strips landlines, disconnected numbers, and DNC-listed contacts in a single pass, so the phone-type check and the DNC scrub happen together instead of as two separate tools. (Disclosure: that's an affiliate link — we may earn a commission if you sign up through it. It's also the tool we recommend after checkout regardless.)

Not legal advice

This is a practical workflow guide, not legal advice. TCPA, TSR, and state texting rules treat wireless and non-wireless numbers differently in places, and the rules change and vary by state and channel. Talk to counsel familiar with telemarketing and texting compliance before you scale a campaign, especially one that spans multiple states.

Get a list that starts mostly mobile

Every Link Leads phone list ships with validated numbers, 96% mobile before you run your own scrub — a real head start over an unvalidated file, though it's still worth the phone-type pass described above before your first send. 10,000 leads is $150 in the order builder, and code PACT takes 20% off your first order. For registering the campaign those numbers land in, see the 10DLC registration guide, or grab the free 100-row sample to see the fields before you buy.