diff --git a/src/sage/rings/complex_double.pyx b/src/sage/rings/complex_double.pyx
index 9038f2dd14f..204066e4904 100644
--- a/src/sage/rings/complex_double.pyx
+++ b/src/sage/rings/complex_double.pyx
@@ -2657,3 +2657,8 @@ cdef inline ComplexDoubleElement ComplexDoubleElement_from_doubles(double re, do
     z._complex.real = re
     z._complex.imag = im
     return z
+
+
+# Support Python's numbers abstract base class
+import numbers
+numbers.Complex.register(ComplexDoubleElement)
diff --git a/src/sage/rings/complex_mpc.pyx b/src/sage/rings/complex_mpc.pyx
index e7f287aa9c9..b6780014030 100644
--- a/src/sage/rings/complex_mpc.pyx
+++ b/src/sage/rings/complex_mpc.pyx
@@ -2575,3 +2575,8 @@ cdef class CCtoMPC(Map):
         y = (<MPComplexField_class>self.codomain())._new()
         mpc_set_fr_fr(y.value, (<ComplexNumber>z).__re, (<ComplexNumber>z).__im, rnd)
         return y
+
+
+# Support Python's numbers abstract base class
+import numbers
+from sage.rings.complex_mpc import MPComplexNumber
diff --git a/src/sage/rings/complex_mpfr.pyx b/src/sage/rings/complex_mpfr.pyx
index b419914f23f..91a6d47fd45 100644
--- a/src/sage/rings/complex_mpfr.pyx
+++ b/src/sage/rings/complex_mpfr.pyx
@@ -3610,3 +3610,8 @@ def _format_complex_number(real, imag, format_spec):
                              "complex format specifier")
         result = format(result, align + width)
     return result
+
+
+# Support Python's numbers abstract base class
+import numbers
+numbers.Complex.register(ComplexNumber)
diff --git a/src/sage/rings/numbers_abc.py b/src/sage/rings/numbers_abc.py
index 17290651196..478a0b36408 100644
--- a/src/sage/rings/numbers_abc.py
+++ b/src/sage/rings/numbers_abc.py
@@ -14,8 +14,6 @@
 #                  http://www.gnu.org/licenses/
 #*****************************************************************************
 
-import numbers
-
 
 def register_sage_classes():
     """
@@ -65,23 +63,5 @@ def register_sage_classes():
         sage: isscalar(4/17)
         True
     """
-    from sage.rings.integer import Integer
-    from sage.rings.rational import Rational
-    from sage.rings.real_mpfr import RealNumber
-    from sage.rings.real_double import RealDoubleElement
-    from sage.rings.complex_mpfr import ComplexNumber
-    from sage.rings.complex_double import ComplexDoubleElement
-    from sage.rings.complex_mpc import MPComplexNumber
-    from sage.rings.qqbar import AlgebraicReal, AlgebraicNumber
-
-    numbers.Integral.register(Integer)
-    numbers.Rational.register(Rational)
-    numbers.Real.register(RealNumber)
-    numbers.Real.register(RealDoubleElement)
-    numbers.Real.register(AlgebraicReal)
-    numbers.Complex.register(ComplexNumber)
-    numbers.Complex.register(MPComplexNumber)
-    numbers.Complex.register(ComplexDoubleElement)
-    numbers.Complex.register(AlgebraicNumber)
-
-register_sage_classes()
+    from sage.misc.superseded import deprecation
+    deprecation(32641, "register_sage_classes is a deprecated no-op")
diff --git a/src/sage/rings/qqbar.py b/src/sage/rings/qqbar.py
index ae926cde625..2cc17707a47 100644
--- a/src/sage/rings/qqbar.py
+++ b/src/sage/rings/qqbar.py
@@ -8546,3 +8546,9 @@ def get_AA_golden_ratio():
         AA_golden_ratio_generator = AlgebraicGenerator(AA_golden_ratio_nf, ANRoot(AAPoly.gen()**2 - AAPoly.gen() - 1, RIF(1.618, 1.6181)))
         AA_golden_ratio = AlgebraicReal(ANExtensionElement(AA_golden_ratio_generator, AA_golden_ratio_nf.gen()))
     return AA_golden_ratio
+
+
+# Support Python's numbers abstract base class
+import numbers
+numbers.Real.register(AlgebraicReal)
+numbers.Complex.register(AlgebraicNumber)
diff --git a/src/sage/rings/real_double.pyx b/src/sage/rings/real_double.pyx
index 405153db6b9..b22897510c0 100644
--- a/src/sage/rings/real_double.pyx
+++ b/src/sage/rings/real_double.pyx
@@ -2943,3 +2943,8 @@ cdef double_repr(double x):
     if v < 0:
         return "-infinity"
     return "NaN"
+
+
+# Support Python's numbers abstract base class
+import numbers
+numbers.Real.register(RealDoubleElement)
diff --git a/src/sage/rings/real_mpfr.pyx b/src/sage/rings/real_mpfr.pyx
index 774ab916659..a5bfcc070e8 100644
--- a/src/sage/rings/real_mpfr.pyx
+++ b/src/sage/rings/real_mpfr.pyx
@@ -6122,3 +6122,8 @@ def create_RealField(*args, **kwds):
     deprecation(24511, "Please import create_RealField from sage.rings.real_field")
     from sage.rings.real_field import create_RealField as cr
     return cr(*args, **kwds)
+
+
+# Support Python's numbers abstract base class
+import numbers
+numbers.Real.register(RealNumber)