How to check if my phone number is spam

[Mark Weins]

Hi,

So I have a top 99% connect rate of 21% and today I started cold calling 18 prospects and I had 0 connects. If I had normal phone numbers then I would expect an average of 3-4 connects by dialing 18 people based on math. 0 connects with 18 prospects is a 0.67-0.77% probability of happening when you reference your past cold calling numbers with new numbers. 

136 Prospects

33 Connects

The above is my average rates in 3 days and you calculate the percentage chance of you not having 1 connect by using chatgpt and asking it the following question. 

"if i have an average connect rate of 24% with 136 prospects and then i call 18 prospects and get 0 connects what is the % chance of that happening"

Chatgpt will then calculate for you and apply something called independent Bernoulli trials or binomial distribution to give you the percentage chance of this happening if it is 5% or lower then that means your current number is pretty much confirmed to be flagged for spam because it's mathematically impossible for you to get so few connects with the amount of prospects you are calling and you can find out fast. 

The gold I want to share here is this excel/google sheets formula that can automate guaranteed detection for spam numbers based on math.

=COMBIN(F1, E1) * I1^E1 * (1 - I1)^(F1 - E1)

Just copy and paste this formula and apply the same stuff I have on , you just need your control group data of your avg cold calling prospects and connects. And just plug in your stats with a suspect phone number for spam and excel will calculate if your number is a spam number for free. This method is good if you don't know how to check if your number is flagged for spam and if you only have 1 cell phone you are doing your calling from or don't have a second mobile carrier number to call yourself with to verify if your number is already flagged as spam.