Number one below: Cell phone number "707-736-7415" - put the phone number in quotes as shown into your favorite search engine (I use Google) and view the results. It took a few clicks on the links in the results, but I eventually found out this phone number was coming from Pacwest.com. Clicked on their Contact link and got the email address, firstname.lastname@example.org. I sent them a complaint with the phone number, explained they were Craigslist scammers and I had a screen shot if they wanted it. Web site URL do.am resolved to an email address of email@example.com - I use http://www.whois.com/ and put the web site URL in their search box to get the results. I sent them an email with the full web link that was sent to my cell phone and also offered a screen shot if they wanted it. Most of the time, I do not get a reply, but every once in a while, they do respond and let me know if they have taken care of it. The more you can report these bastards, the better.
Number two below: "406-763-7597" This cell phone number belongs to Qwest Corporation, which is owned by Century Link. Centurylink.com, clicked on Contact Us, found nothing. Went back to their main page, clicked on Privacy at the bottom and sure enough, an Abuse email address was shown on the righthand side of the screen - abuse@CenturyLinkservices.net
Number three below: "231-828-9751" comes from Frontier North, Inc in Michigan, https://frontier.com. I couldn't find any email addresses to report scams, so I put frontier.com in the WHOIS search engine at whois.com and got an email address, firstname.lastname@example.org, as well as email@example.com
Number four below: "779-216-5658" Peerless Network of Illinois, peerlessnetwork.com, had to do a WHOIS search (or could have filled out the Contact Us form, but email is faster) and got firstname.lastname@example.org and email@example.com, as you can see he was having fun with me, claiming NOT to be a scammer.
Number five below: "424-274-6431", Bandwidth.com Clec, Llc - Ca, bandwidth.com, clicked on Contact, If you are not a customer, decided not to fill out the form and click on Law Enforcement link and got an email address, firstname.lastname@example.org, also did a WHOIS search and got an email address of email@example.com. As you can see, this scammer had a wonderful story to tell me. I told him what you see and to visit my web site, netcrimes.net. Didn't hear back from him, LOL.
Number six below: "617-684-5914", Allegiance Telecom Massachusetts, part of XO Communications, www.xo.com, there is a customer support form you can fill out, but I dug some more and under their Legal and Privacy link I finally found firstname.lastname@example.org
Number seven below: "207-517-9081", hmm, this is in Maine, where I live, but aha, they tried to get me to click on the scam link, which was located on the web site goo.gl. Did a WHOIS search on that site and it came back to Google, but I suspected something was up with that. Typed in the whole address and it came to do.am - remember that web site from the first example? AHA! email@example.com. Now the phone number. Bandwidth.com in Maine. firstname.lastname@example.org and email@example.com.
Number eight below: "410-934-7720", Verizon in Maryland, verizon.com,couldn't find any way to report the scam and went with the default firstname.lastname@example.org, the web site was clan.su, which WHOIS showed an email address of email@example.com. Are you seeing a pattern with some of these companies harboring scammers?
Number 10 below: "914-502-9774" which comes from Level 3 Communications, level3.com, firstname.lastname@example.org. As you can see, this scammer was a bit different.
Number 11 below: "518-977-5945", Barr Tell Usa, Inc., barrtell.com, email@example.com
Number 12 below: "818-533-1381", Well, this was a very interesting one. The number traced back to someone called The Exotic Muffin (also an escort service), but eventually found they were using Verizon, firstname.lastname@example.org
Number 13 below: "757-504-1292", Omnipoint Communications, which I found out merged with Voicestream Wireless, which became T-Mobile, t-mobile.com, email@example.com
Number 14 below: This is a twofer - "818-584-3721" and "818-584-3723" traced back to Pacific Bell which is owned by AT&T, firstname.lastname@example.org, the web site was do.am, our good old friend, reported to email@example.com and firstname.lastname@example.org
Number 15 below: "443-266-6738" Global Crossing Local Services in Maryland which is now owned by Level 3 Communications, level3.com, email@example.com
Number 16 below: "602-904-8942" Cellco Partnership dba Verizon Wireless, firstname.lastname@example.org
Number 17 below: "210-399-2556" Level 3 Communications, level3.com, email@example.com
Number 18 below: AT&T, firstname.lastname@example.org
Don't forget to add any numbers you received that you feel are a scam number from Craigslist. Post a screen shot if you can. Happy hunting!