thesurvivor2299.com

[Ashtoreth]

Interesting fact: the ciphered message includes all the 26 letters of the English alphabet.

Frequency:

P - 7
Q - 6
B - 5
V - 5
Y - 5
H - 4
M - 4
A - 3
F - 3
G - 3
I - 3
L - 3
N - 3
S - 3
T - 3
D - 2
E - 2
O - 2
R - 2
Z - 2
C - 1
J - 1
K - 1
U - 1
W - 1
X - 1

If this is a substitution cipher, then P might correspond to E, because E is the most commonly used letter in English.

The number 5120, as Paddy said, could be 2015. NGQHT might be the month (March or April).