Called claiming I was eligible for a rebate on my Washington Gas bill. Just the usual sneaky slamming attempt. This is not the only number they have called from. Claims to be located in NY but the only website is from a company in Texas. They may have regional offices to act as alternate gas suppliers to the local delivery companies. I can't verify atm since the Washington Gas website is down for maintenance so I cannot check against the list of authorized Washington Gas suppliers.
Edit: just found one of their other calling numbers: 301-946-9440
Called us at 8:49 am today, Saturday. From 301-946-9440. Left no message. Also called at the same time a few days ago from 301-982-5037 leaving no message. Clearly shyster telemarketers. We're on the Do Not Call Registry but that has major loopholes. We do use Wash Gas. Will file a complaint with FCC however.