Results of DNS Zone Transfer (AXFR) Test
Matthijs R. Koot, 2011-07-08, University of Amsterdam
Number of domains: 1063954
Number of name servers involved: 223619
TLD	Domain Names			Name Servers
	Success	Total	%	Success	Total	%
ac	18	70	25.7	18	64	28.1
ad	1	19	5.3	1	12	8.3
ae	17	299	5.7	14	122	11.5
aero	8	56	14.3	8	54	14.8
af	0	6	0.0	0	5	0.0
ag	3	51	5.9	3	48	6.3
ai	0	8	0.0	0	8	0.0
al	10	28	35.7	8	21	38.1
am	12	102	11.8	11	90	12.2
an	2	6	33.3	2	6	33.3
ao	1	10	10.0	1	9	11.1
aq	1	3	33.3	1	3	33.3
ar	1089	4614	23.6	438	2033	21.5
as	5	31	16.1	5	30	16.7
asia	3	46	6.5	3	39	7.7
at	326	3855	8.5	191	1457	13.1
au	1513	8929	16.9	788	3655	21.6
aw	1	4	25.0	1	3	33.3
ax	0	7	0.0	0	5	0.0
az	7	48	14.6	6	43	14.0
ba	30	235	12.8	26	163	16.0
bb	0	6	0.0	0	6	0.0
bd	9	30	30.0	8	28	28.6
be	695	5158	13.5	371	2030	18.3
bf	0	8	0.0	0	6	0.0
bg	272	1087	25.0	170	677	25.1
bh	0	21	0.0	0	19	0.0
bi	0	3	0.0	0	3	0.0
biz	607	3498	17.4	352	2035	17.3
bj	0	1	0.0	0	1	0.0
bm	1	7	14.3	1	6	16.7
bn	0	14	0.0	0	10	0.0
bo	15	55	27.3	13	50	26.0
br	2063	14228	14.5	1243	6217	20.0
bs	1	5	20.0	1	5	20.0
bt	2	7	28.6	2	5	40.0
bw	1	6	16.7	1	6	16.7
by	41	353	11.6	31	163	19.0
bz	20	155	12.9	19	128	14.8
ca	785	6436	12.2	505	3157	16.0
cat	42	317	13.2	23	215	10.7
cc	173	1614	10.7	130	894	14.5
cd	9	23	39.1	9	23	39.1
cg	0	1	0.0	0	1	0.0
ch	578	5028	11.5	314	2172	14.5
ci	2	14	14.3	2	11	18.2
ck	0	2	0.0	0	2	0.0
cl	442	2385	18.5	276	1226	22.5
cm	0	29	0.0	0	24	0.0
cn	2502	24331	10.3	1108	4278	25.9
co	183	953	19.2	122	505	24.2
com	75810	522434	14.5	26912	118088	22.8
coop	10	101	9.9	9	90	10.0
cr	29	153	19.0	26	142	18.3
cu	9	52	17.3	9	44	20.5
cv	0	5	0.0	0	4	0.0
cx	10	87	11.5	10	73	13.7
cy	8	71	11.3	6	38	15.8
cz	1506	6296	23.9	348	1523	22.8
de	2850	50156	5.7	1015	7344	13.8
dj	4	19	21.1	4	14	28.6
dk	487	5949	8.2	131	1034	12.7
dm	0	3	0.0	0	3	0.0
do	8	136	5.9	8	97	8.2
dz	16	96	16.7	16	51	31.4
ec	33	218	15.1	22	130	16.9
edu	400	3217	12.4	314	2381	13.2
ee	38	698	5.4	33	218	15.1
eg	14	187	7.5	11	72	15.3
es	787	6994	11.3	449	3050	14.7
et	2	6	33.3	1	3	33.3
eu	530	3282	16.1	305	1909	16.0
fi	247	3689	6.7	105	1096	9.6
fj	6	12	50.0	3	10	30.0
fk	0	1	0.0	0	1	0.0
fm	60	354	16.9	40	307	13.0
fo	0	19	0.0	0	6	0.0
fr	1803	17113	10.5	984	3788	26.0
ga	1	3	33.3	1	3	33.3
gd	0	15	0.0	0	14	0.0
ge	44	188	23.4	20	98	20.4
gf	1	3	33.3	1	3	33.3
gg	0	15	0.0	0	12	0.0
gh	1	8	12.5	1	8	12.5
gi	1	12	8.3	1	9	11.1
gl	0	13	0.0	0	11	0.0
gm	1	7	14.3	1	5	20.0
gn	0	1	0.0	0	1	0.0
gov	104	984	10.6	65	657	9.9
gp	0	9	0.0	0	5	0.0
gr	555	2985	18.6	296	1664	17.8
gs	5	43	11.6	4	39	10.3
gt	16	75	21.3	13	58	22.4
gy	3	6	50.0	3	6	50.0
hk	243	1203	20.2	153	708	21.6
hm	0	9	0.0	0	7	0.0
hn	9	39	23.1	8	37	21.6
hr	147	1314	11.2	86	548	15.7
ht	0	3	0.0	0	3	0.0
hu	1112	5839	19.0	517	1836	28.2
id	134	577	23.2	125	428	29.2
ie	200	1793	11.2	86	650	13.2
il	679	4540	15.0	251	1303	19.3
im	4	45	8.9	3	38	7.9
in	502	2414	20.8	283	1425	19.9
info	1899	11111	17.1	1035	4944	20.9
int	3	58	5.2	3	55	5.5
io	2	19	10.5	2	18	11.1
iq	2	14	14.3	2	12	16.7
ir	128	694	18.4	93	576	16.1
is	75	372	20.2	27	166	16.3
it	1670	16246	10.3	721	3889	18.5
je	1	7	14.3	1	7	14.3
jm	5	18	27.8	5	16	31.3
jo	9	108	8.3	9	58	15.5
jobs	4	46	8.7	3	44	6.8
jp	6870	40043	17.2	2555	10926	23.4
ke	10	33	30.3	7	25	28.0
kg	8	37	21.6	6	26	23.1
kh	0	13	0.0	0	12	0.0
ki	0	3	0.0	0	3	0.0
km	0	1	0.0	0	1	0.0
kn	1	1	100.0	1	1	100.0
kr	283	1811	15.6	257	1006	25.5
kw	18	65	27.7	13	46	28.3
ky	0	7	0.0	0	7	0.0
kz	60	221	27.1	42	149	28.2
la	7	111	6.3	7	72	9.7
lb	5	69	7.2	5	49	10.2
lc	1	6	16.7	1	4	25.0
li	17	65	26.2	9	60	15.0
lk	33	106	31.1	18	64	28.1
lr	1	2	50.0	1	2	50.0
ls	1	2	50.0	1	2	50.0
lt	117	1492	7.8	71	388	18.3
lu	13	213	6.1	9	144	6.3
lv	144	846	17.0	101	489	20.7
ly	5	24	20.8	4	24	16.7
ma	48	327	14.7	41	205	20.0
mc	0	11	0.0	0	5	0.0
md	37	177	20.9	25	134	18.7
me	36	277	13.0	31	213	14.6
mg	4	15	26.7	3	12	25.0
mil	3	59	5.1	3	46	6.5
mk	11	203	5.4	11	91	12.1
ml	3	5	60.0	3	5	60.0
mm	2	10	20.0	1	6	16.7
mn	6	92	6.5	5	51	9.8
mo	10	61	16.4	10	44	22.7
mobi	31	195	15.9	26	164	15.9
mp	1	4	25.0	1	2	50.0
mq	1	2	50.0	1	2	50.0
mr	2	8	25.0	2	8	25.0
ms	12	54	22.2	11	48	22.9
mt	4	51	7.8	3	32	9.4
mu	1	23	4.3	1	16	6.3
museum	1	4	25.0	1	4	25.0
mv	0	8	0.0	0	7	0.0
mw	0	5	0.0	0	4	0.0
mx	568	2636	21.5	382	1722	22.2
my	188	1124	16.7	136	730	18.6
mz	1	16	6.3	1	14	7.1
na	10	19	52.6	3	12	25.0
name	50	282	17.7	42	233	18.0
nc	2	31	6.5	2	17	11.8
net	10975	68636	16.0	5501	26082	21.1
nf	0	6	0.0	0	6	0.0
ng	5	31	16.1	5	26	19.2
ni	12	55	21.8	12	42	28.6
nl	2016	13452	15.0	647	3846	16.8
no	209	2277	9.2	91	708	12.9
np	6	31	19.4	6	24	25.0
nr	1	6	16.7	1	6	16.7
nu	77	755	10.2	66	499	13.2
nz	146	1827	8.0	87	694	12.5
om	1	25	4.0	1	15	6.7
org	7811	52690	14.8	3957	20515	19.3
pa	2	74	2.7	2	49	4.1
pe	99	626	15.8	63	250	25.2
pf	15	26	57.7	2	9	22.2
pg	1	4	25.0	1	4	25.0
ph	72	509	14.1	62	354	17.5
pk	56	293	19.1	37	212	17.5
pl	2272	15198	14.9	1061	4260	24.9
pn	0	7	0.0	0	5	0.0
pr	0	21	0.0	0	19	0.0
pro	18	49	36.7	8	29	27.6
ps	10	72	13.9	10	63	15.9
pt	145	1547	9.4	117	905	12.9
py	17	98	17.3	14	73	19.2
qa	5	64	7.8	5	41	12.2
re	2	17	11.8	2	13	15.4
ro	1351	6204	21.8	682	3097	22.0
rs	89	398	22.4	59	245	24.1
ru	4537	23232	19.5	2244	6958	32.3
rw	0	6	0.0	0	5	0.0
sa	60	361	16.6	38	206	18.4
sb	0	1	0.0	0	1	0.0
sc	6	36	16.7	6	34	17.6
sd	4	15	26.7	3	13	23.1
se	475	5024	9.5	233	1772	13.1
sg	70	779	9.0	62	414	15.0
sh	0	32	0.0	0	28	0.0
si	112	845	13.3	73	463	15.8
sk	263	1773	14.8	145	693	20.9
sl	1	2	50.0	1	2	50.0
sm	1	18	5.6	1	13	7.7
sn	4	28	14.3	3	28	10.7
sr	0	5	0.0	0	5	0.0
st	16	124	12.9	11	107	10.3
su	59	327	18.0	53	220	24.1
sv	19	82	23.2	13	67	19.4
sy	3	30	10.0	3	18	16.7
sz	2	4	50.0	2	3	66.7
tc	2	79	2.5	2	53	3.8
tel	0	12	0.0	0	4	0.0
tf	0	7	0.0	0	3	0.0
tg	1	2	50.0	1	1	100.0
th	191	1111	17.2	163	695	23.5
tj	1	8	12.5	1	8	12.5
tk	16	109	14.7	16	81	19.8
tl	1	12	8.3	1	9	11.1
tm	1	13	7.7	1	12	8.3
tn	8	129	6.2	2	9	22.2
to	114	672	17.0	75	443	16.9
tr	432	3755	11.5	283	2318	12.2
travel	18	60	30.0	6	47	12.8
tt	4	33	12.1	4	31	12.9
tv	538	3746	14.4	377	2243	16.8
tw	785	4473	17.5	577	3003	19.2
tz	5	14	35.7	4	12	33.3
ua	762	3406	22.4	535	1349	39.7
ug	4	16	25.0	2	13	15.4
uk	3957	31464	12.6	1402	8625	16.3
us	731	4282	17.1	398	2443	16.3
uy	76	295	25.8	56	195	28.7
uz	9	56	16.1	9	46	19.6
va	0	2	0.0	0	2	0.0
vc	6	52	11.5	3	44	6.8
ve	93	572	16.3	82	355	23.1
vg	3	32	9.4	3	27	11.1
vi	1	4	25.0	1	4	25.0
vn	117	1880	6.2	66	454	14.5
vu	2	19	10.5	2	18	11.1
wf	1	1	100.0	1	1	100.0
ws	195	1033	18.9	140	715	19.6
ye	2	8	25.0	2	5	40.0
za	217	1595	13.6	110	651	16.9
zm	1	9	11.1	1	7	14.3
zw	2	15	13.3	1	12	8.3
Total:	151684	1063954	14,3	N/A(*)	N/A(*)	N/A(*)
* 223619 different nameservers were included, but each of them may serve domains in multiple TLDs
and is then counted multiple times here. The totals of these columns would be misleading.