Non-American with a South Jersey accent here: I say “ant”.
Well, your knowledge appears to be inadequate. “Ahnt” isn’t even universal within England, never mind the rest of the UK. I haven’t done any sort of a survey, but my impression is that “ant” is more usual in the North of England – it’s certainly very common.
From Australia and I always say “Auntie”, which I guess is “aren’t” with an “ee” at the end. And “aren’t” is one syllable.
I’m a (north of England) “Brit” and I’ve never heard anyone from round here pronounce it as anything other that “ANT”
I say “awnt” (rhymes with “taunt”).
My (white guy) boss was the one who told me he thought this was a “black thing”. All the black people he knew pronounced “aunt” like I do, and only black people. Up to that moment, I had assumed it was a regional thing, not racial. All my aunts are from the Midwest. I thought “awnt” was reflective of their dialect, not black dialect.
I don’t know one way or the other. All I know is “ant” just doesn’t feel right for some reason.
I pronounce it exactly the way the nurse does in Them!
Where I grew up in the Midwest, it was also a race-related thing.
White people said “ant.” Black people said “ahnt.”
Properly.
‘Something else.’
If it’s ‘my aunt’, it’s ahnt.
If it’s ‘Aunt Mary’, it’s ant.
Aren’t and can’t rhyme for you? So is it aren’t and carn’t? Oh and you said they rhyme with aunt, so now I’m really confused.
I go both ways. depending on my mood and which aunt(s) I’m talking about.
It’s ‘Ant’ when I’m on the Mainland, but ‘On-tee’ when I’m in the Islands or with my Honolulu High School classmates. As in, “My Auntie gi’ me da side-eyes wen I tole one dirty joke to my Bruddah-in-Law”. 
“Ant.” I grew up in Alaska, parents from the PNW. I never knew anybody who pronounced it differently until I left home.
No true New Englander would pronounce it “ant”. Even my cousin, who moved to the south when he was in Jr High still says “ahnt”.
However… the pancake mix was always “An-ja-My-muh”, so in that one instance it gets mangled. But it’s one of those compound words you learn before you know what the two components actually are.
Apropos of nothing in particular Non-American with a South Jersey Accent should be the title of your autobiography ;).
Oh and “ant.”
For Americans, I think it’s generally: New Englanders + Blacks = “aunt”; everyone else = “ant”.
That describes me as well. And I’ll use the non-insect pronunciation if I think there’s any chance of ambiguity.
Proof that all of you “ant-ers” know the “ahnt-ers” are correct. 
My black relatives and I all pronounce it “ant.” I’m from NY.
New Englander, born and bred. I say “aunt” to rhyme with “haunt”. I can’t quite figure out the difference between the “awwwnt” and “ahnt” people are talking about, though.
(I am often complimented on my enunciation. This comes from an immigrant mother who was adamant that I not develop her accent. My way is almost assuredly my region’s default, since I was never made to practice another way).