A survey caller, as later suggested here, is not covered by the DNCR, which was built for cold sales calls only. Research firms need to receive your no-call request directly, and most obey as a courtesy, being the one major type of nuisance caller without a Federal law to support your demand. They are currently subject to TCPA claims by mobile phone users, but I expect the industry to one day win the same kind of exemption they get from the Telemarketing Sales Rule.