A radio k-labeling f of a graph G is a function f from V (G) to

such that

for every two distinct vertices x and y of G, where d(x, y) is the distance between any two vertices

. The span of a radio k-labeling f is denoted by sp(f) and defined as max

. The radio k-labeling is a radio labeling when k = diam(G). In other words, a radio labeling is an injective function

such that

for any pair of vertices

. The radio number of G denoted by rn(G), is the lowest span taken over all radio labelings of the graph. When k = diam(G) - 1, a radio k-labeling is called a radio antipodal labeling. An antipodal labeling for a graph G is a function

such that

holds for all

. The radio antipodal number for G denoted by an(G), is the minimum span of an antipodal labeling admitted by G. In this paper, we investigate the exact value of the radio number and radio antipodal number for the circulant graphs G(4k + 2; {1, 2}).