Strong's numbers

σημεῖον G4592

sēmeîon

say-mi'-on

neuter of a presumed derivative of the base of σημαίνω; an indication, especially ceremonially or supernaturally:--miracle, sign, token, wonder.

σημεῖον, -ου, τό [in LXX chiefly for אוֹת ;]

a sign, mark, token;

(a) of that which distinguishes a person or thing from others: Mt 26:48, Lk 2:12, II Th 3:17 (cf. Deiss., LAE, 1532); seq. gen. epexeg., Ro 4:11; c. gen. obj., Mt 24:8, 30, II Co 12:12; c. gen. subj., Mt 16:3;

(b) a sign of warning or admonition: Mt 12:39 16:4, Lk 2:34 11:29, 30, I Co 14:22;

(d) of miracles and wonders (MM, xxii), regarded as signs of a divine authority: Mt 12:38, 39 16:1, 4, Mk 8:11, 12 Lk 11:16, 29 23:8, Jo 2:11, 18, 23 4:54 6:30 10:41 12:18, Ac 4:16, 22; pl., Mk 16:[17, 20], Jo 2:11, 23 3:2 6:2, 14, 26 7:31 9:16 11:47 12:37 20:30, Ac 8:6, I Co 1:22 (Lft., Notes, 162); the same ascribed to false teachers and demons: Mt 24:24, Mk 13:22, II Th 2:9, Re 13:13, 14 16:14 19:20; σ. καὶ τέρατα (τ. καὶ σ.; cf. Tr., Syn., § xci), Mt 24:24, Mk 13:22, Jo 4:48, Ac 2:19, 43 4:30 5:12 6:8 7:36 14:3 15:12, Ro 15:19, II Th 2:9; id. seq. καὶ δυνάμεις, II Co 12:12, He 2:4; σ. καὶ δυνάμεις, Ac 8:13; δ. καὶ τ. καὶ σ., Ac 2:22; σ. διδόναι, Mt 24:24, Mk 13:22.†

From G. Abbott-Smith, A Manual Greek Lexicon of the New Testament (1922), in the public domain.

Shown in the King James Version (KJV), whichever translation you read in — it is the text these numbers are tagged against.

Luke 21:7
And they asked him, saying, Master, but when shall these things be? and what sign will there be when these things shall come to pass?
Luke 21:11
And great earthquakes shall be in divers places, and famines, and pestilences; and fearful sights and great signs shall there be from heaven.
Luke 21:25
And there shall be signs in the sun, and in the moon, and in the stars; and upon the earth distress of nations, with perplexity; the sea and the waves roaring;
Luke 23:8
And when Herod saw Jesus, he was exceeding glad: for he was desirous to see him of a long season, because he had heard many things of him; and he hoped to have seen some miracle done by him.
John 2:11
This beginning of miracles did Jesus in Cana of Galilee, and manifested forth his glory; and his disciples believed on him.
John 2:18
Then answered the Jews and said unto him, What sign shewest thou unto us, seeing that thou doest these things?
John 2:23
Now when he was in Jerusalem at the passover, in the feast day, many believed in his name, when they saw the miracles which he did.
John 3:2
The same came to Jesus by night, and said unto him, Rabbi, we know that thou art a teacher come from God: for no man can do these miracles that thou doest, except God be with him.
John 4:48
Then said Jesus unto him, Except ye see signs and wonders, ye will not believe.
John 4:54
This is again the second miracle that Jesus did, when he was come out of Judaea into Galilee.