There is a specific cipher that uses that range of numbers
Use a Polybius square to decode
1
2
3
4
5
1
a
b
c
d
e
2
f
g
h
j
k
3
l
m
n
o
p
4
q
r
s
t
u
5
v
w
x
y
z
eioyreiparasiteatwdsis
8oyr8parasitea2d6s
Code #2
Observations
The code is only missing the keyword and there is a good hint that points to it
The a href HTML attribute is used to link to a site or page
6txe7linko6n9p
Code #3
Observations
You have three different characters. One is obviously a split so you need a cipher that uses 2 bits.
The dots seems to be a delimiter
\\\\\\\\\\.
\\\\\\/.
/\\//.
//.
\\\\\\//.
//\\\\.
////\\.
\\\\/\\.
//\\\\\\.
\\\\\\
The cipher uses two bits: / & \. Morse uses two bits. We know that morse numbers use 5 bits. Look at the first word, it contains 10 \, they seem to be used in pairs. \\ are dots, / are dashes
