How many devices can a modem+wifi router support ?

[venkatachar]

I am having a Alphion 1143 modem+wifi router and haven't configured bridge mode.
Recently i added few smart devices to the mix and i have around 8-10 devices in total which includes few mobile phone.
I am noticing a lag in internet connectivity. I am unable to figure out if its an ISP speed issue or a DNS issue or the limitation of the modem+router.

Anyone know how many devices these modem+router can support?

 

[wheatbread]

Assuming this is only one AP on Wi-Fi 4, not many.

 

[venkatachar]

Thanks. Will add one more AP. I got some time today and tested DNS times. looks like a BSNL routing issue. Some domains are taking more than normal response time. Will raise a complaint

	test1	test2	test3	test4	test5	test6	test7	test8	test9	test10	Average
8.8.8.8	18 ms	9 ms	33 ms	18 ms	38 ms	18 ms	12 ms	95 ms	10 ms	12 ms	26.3​
192.168.1.1	1 ms	3 ms	2 ms	1 ms	2 ms	1 ms	1 ms	1 ms	1 ms	2 ms	1.5​
unbound	12 ms	12 ms	1000 ms	1000 ms	14 ms	8 ms	1000 ms	7 ms	7 ms	1000 ms	406​
cloudflare	29 ms	30 ms	26 ms	34 ms	30 ms	29 ms	27 ms	30 ms	30 ms	29 ms	29.4​
level3	149 ms	149 ms	149 ms	154 ms	152 ms	146 ms	149 ms	149 ms	146 ms	146 ms	148.9​
google	18 ms	9 ms	34 ms	12 ms	9 ms	9 ms	10 ms	92 ms	12 ms	17 ms	22.2​
quad9	267 ms	72 ms	48 ms	45 ms	60 ms	37 ms	119 ms	84 ms	88 ms	508 ms	132.8​
adguard	260 ms	259 ms	260 ms	260 ms	260 ms	259 ms	260 ms	265 ms	271 ms	260 ms	261.4​

 

[wheatbread]

This is normal and there's nothing your ISP or DNS resolvers can do about it, only the domain owner can do something and they already chose not to.
Also get a Wi-Fi 5 AP this time, if you can.