Left rambling message. Probably political. So tired of them all.
 Oct 23rd, 2012
It's ALLIANCE FOR AMERICA's FUTURE some political - anti EPA agency. They left me a msg & that is who they said they were.
 Oct 20th, 2012
Area Code 206 is for Seattle, Washington, and for portions of its metropolitan area from Des Moines to Woodway. 206 also serves the islands of Mercer, Bainbridge, and Vashon.

After doing some Google research, I found this:

1. My caller ID shows SIMS 206-397-1505, no message was left. I called the # back, just a recording which does not identify the company, but, an option to press #1 to stop further calls ... apparently it doesn't work, I received a call shortly afterwards from 800-780-7492 - which is a home security biz. I confirmed their telemarketing # is 206-397-1505. I asked how they got my #, the guy told me my husband gave our tel # when he registered at hulu.com http://whocallsme.com/Phone-Number.aspx/2063971505/2
Caller: SIMS
Call Type: Telemarketer

2. Well just so everyone knows, this company has been making telemarketing calls to my phone for past couple of days even thought my phone is on DNC list. They use a guy named Kevin who would call me and so last 2 times I asked him to transfer me to an expert, instead he sent me to Monitronics. And the funny thing is when... I complained to Monitronics about this kind of telemarketing to DNC numbers being illegal, the representative says go ahead do whatever I can do and says "Fu@$ Off" before hanging up on me. Do you guys really do business with this company? The guy Kevin called from (206) 397 -1505 and he transferred me to a representative on 916-437-0900. http://www.facebook.com/monitronics

3. Google Search says the number 916-437-0900 belongs to a Joey Morris in Sacramento, CA 95814-0000

A Monitronics Representitive on FaceBook said he would start investigating what happened. You can contact him --- Leah Shafer, lshafer@monitronics.com , 972-243-7443, ext. 3029.

Monitronics Home Security Systems calls from 6 phone numbers:

And this SIMS calls from 7 phone numbers --- notice the 206-397-1505 number does over lap to both the SIMS and the Monotronics

Here http://whocalled.us/lookup/sims is says SIMS calls from 13 numbers, however, after looking up ALL of those numbers, only 7 are from this SIMS. Do not confuse this SIMS for SIM LLC, a Financial Department, they are two separate companies.
The 7 numbers this SIMS calls from are

Customer Service
Monitronics Funding LP 1-800-447-9239
Department CH 8628
Palatine, IL 60055-8628

New Service 800-290-0709
Customer Service
ATTN: Customer Service
PO Box 814530
Dallas, TX 75381-4530
 Apr 24th, 2010