Wormholes have two ends, a source and a destination.

The source end labeled according to the chart below. Names in groups 1-6 target Unknown space with 1 being the easiest. Names in groups 7, 8, and 9 open into Known space (high-sec, low-sec, 0.0 respectively).

The destination end is always labeled K162. They only come into existence when somebody enters a source wormhole.

1 - H121 P060 Q317 V301 Y790 Z647 Z971
2 - C125 D364 D382 G024 I182 N766 R943
3 - C247 L477 M267 N968 O477 O883 X702
4 - E175 M609 O128 T405 X877 Y683 Z457
5 - H296 H900 L614 M555 N062 N432 N770 V911
6 - A982 B041 R474 S804 U319 U574 V753 W237

7 - A641 B274 B449 B520 D792 D845 N110 S047
8 - A239 C140 C391 J244 N290 N944 R051 U210
9 - C248 E545 K329 K346 S199 V283 Z060 Z142

A239(L) A641(H) A982(6)
B041(6) B274(H) B449(H) B520(H)
C125(2) C140(L) C247(3) C248(Z) C391(L)
D364(2) D382(2) D792(H) D845(H)
E175(4) E545(Z)
G024(2)
H121(1) H296(5) H900(5)
I182(2)
J244(L)
K329(Z) K346(Z)
L477(3) L614(5)
M267(3) M555(5) M609(4)
N062(5) N110(H) N290(L) N432(5) N766(2) N770(5) N944(L) N968(3)
O128(4) O477(3) O883(3)
P060(1)
Q317(1)
R051(L) R474(6) R943(2)
S047(H) S199(Z) S804(6)
T405(4)
U210(L) U319(6) U574(6)
V283(Z) V301(1) V753(6) V911(5)
W237(6)
X702(3) X877(4)
Y683(4) Y790(1)
Z060(Z) Z142(Z) Z457(4) Z647(1) Z971(1)

Source: http://011000110110111101100011011010110110110001100101.com/eve/whtcmap.png
(Update: Not working, try here instead.)

The data in the following chart is based on information that has since been redacted. It may no longer be correct and there is no quick way to verify it.

Name Dest. Instant mass
limit (Mkg)
Lifetime mass
limit (Gkg)
Lifetime
(hours)
Lifetime mass
limit regeneration
(Mkg/hour)
Theoretical lifetime
mass limit at
1 hour before
collapse (Gkg)
A239 L 300 2.00 24
A641 H 1000 2.00 16
A982 6 300 3.00 24
B041 6 300 5.00 48 500 23.5
B274 H 300 2.00 24
B449 H 1000 2.00 16
B520 H 300 5.00 24 500 11.5
C125 2 20 1.00 16
C140 L 1350 3.00 24
C247 3 200 2.00 16
C248 Z 1800 5.00 24 500 11.5
C391 L 1800 5.00 24 500 11.5
D364 2 300 1.00 16
D382 2 300 2.00 16
D792 H 1000 3.00 24
D845 H 300 5.00 24
E175 4 300 2.00 16
E545 Z 300 2.00 24
G024 2 300 2.00 16
H121 1 20 0.50 16
H296 5 1350 3.00 24
H900 5 300 3.00 24
I182 2 300 2.00 16
J244 L 20 1.00 24
K329 Z 1800 5.00 24
K346 Z 300 3.00 24
L477 3 300 2.00 16
L614 5 20 1.00 24
M267 3 300 1.00 16
M555 5 1000 3.00 24
M609 4 20 1.00 16
N062 5 300 3.00 24
N110 H 20 1.00 24
N290 L 1800 5.00 24
N432 5 1350 3.00 24
N766 2 300 2.00 16
N770 5 300 3.00 24
N944 L 1350 3.00 24
N968 3 300 2.00 16
O128 4 300 1.00 24 100 2.3
O477 3 300 2.00 16
O883 3 20 1.00 16
P060 1 20 0.50 16
Q317 1 20 0.50 16
R051 L 1000 3.00 16
R474 6 300 3.00 24
R943 2 300 0.75 16
S047 H 300 3.00 24
S199 Z 1350 3.00 24
S804 6 20 1.00 24
T405 4 300 2.00 16
U210 L 300 3.00 24
U319 6 1800 50.00 48 500 23.5
U574 6 300 3.00 24
V283 Z 1000 3.00 24
V301 1 20 0.50 16
V753 6 1350 3.00 24
V911 5 1350 3.00 24
W237 6 1350 3.00 24
X702 3 300 1.00 24
X877 4 300 2.00 16
Y683 4 300 2.00 16
Y790 1 20 0.50 16
Z060 Z 20 1.00 24
Z142 Z 1350 3.00 24
Z457 4 300 2.00 16
Z647 1 20 0.50 16
Z971 1 20 0.10 16

Source: http://www.eve-metrics.com/wormholes