AT40 / Seacrest years.

[edisonlite]

I’m trying to determine info for most of the national radio countdowns that aired (specifically what years each ran, and which chart was used for the countdown). I used the Charis Music site and Wikipedia as a basis (and some googling). Can anyone help fill in the blanks (and correct any wrong info)?

I've asked similar questions on other threads but I'm trying to keep to the listed subject matter, and "General Music Discussion" seemed the place for this.

AT40 (CHR) (Seacrest years) - 1/04 - today? - / chart basis? (guessing R&R CHR until it ended? Then?)
AT40 (Hot AC) (Seacrest years) - 1/09-7/12? / chart basis? (guessing R&R Hot AC until it ended? Then?)

Thanks for any help!

[Shadoe Fan]

Seacrest AT40 is January 10, 2004-present. AT40 HAC December 8, 2004 to present. See my post in the other thread for charts.

[edisonlite]

Thanks again! Were both these Seacrest charts based on R&R (Mainstream & Hot AC, respectively) until R&R ceased to exist? And then Mediabase charts?

[Shadoe Fan]

Nov 14, 2023 14:36:15 GMT -5 edisonlite said:

Thanks again! Were both these Seacrest charts based on R&R (Mainstream & Hot AC, respectively) until R&R ceased to exist? And then Mediabase charts?

No, it always used an in house Mediabase chart.

[edisonlite]

Thanks!