Country stats for last year of data For these country-level stats, the most recent test from each client address is examined within aggregated IP blocks (/24 for IPv4 and /40 for IPv6). If the most recent test in an IP block shows spoofing, the IP block is considered to allow spoofing. If ALL clients indicate blocking, the IP block is considered to block spoofing. (It is considered NAT blocking if there are no non-NAT tests found.) If some clients showed spoofing but the most recent tests show blocking (and there's no evidence of a change in blocking policy), then the IP block is considered "inconsistent".

Country	Client IP blocks	Spoofing IP blocks	Blocking IP blocks		Inconsistent IP blocks
			Non-NAT	NAT
usa (United States)	6188	297 (4.8%)	1015 (16.4%)	4876 (78.8%)	0 (0.0%)
bra (Brazil)	1024	178 (17.4%)	67 (6.5%)	777 (75.9%)	2 (0.2%)
ind (India)	2238	175 (7.8%)	75 (3.4%)	1973 (88.2%)	15 (0.7%)
kor (South Korea)	1443	81 (5.6%)	891 (61.7%)	471 (32.6%)	0 (0.0%)
isr (Israel)	293	63 (21.5%)	4 (1.4%)	224 (76.5%)	2 (0.7%)
vnm (Vietnam)	168	50 (29.8%)	6 (3.6%)	112 (66.7%)	0 (0.0%)
gbr (United Kingdom)	1734	48 (2.8%)	120 (6.9%)	1566 (90.3%)	0 (0.0%)
zaf (South Africa)	283	48 (17.0%)	26 (9.2%)	209 (73.9%)	0 (0.0%)
jpn (Japan)	384	39 (10.2%)	35 (9.1%)	309 (80.5%)	1 (0.3%)
can (Canada)	815	35 (4.3%)	99 (12.1%)	681 (83.6%)	0 (0.0%)
aus (Australia)	874	30 (3.4%)	54 (6.2%)	790 (90.4%)	0 (0.0%)
zmb (Zambia)	40	29 (72.5%)	2 (5.0%)	9 (22.5%)	0 (0.0%)
ita (Italy)	490	26 (5.3%)	15 (3.1%)	449 (91.6%)	0 (0.0%)
pol (Poland)	289	25 (8.7%)	15 (5.2%)	249 (86.2%)	0 (0.0%)
are (United Arab Emirates)	85	20 (23.5%)	1 (1.2%)	64 (75.3%)	0 (0.0%)
bgd (Bangladesh)	105	17 (16.2%)	1 (1.0%)	87 (82.9%)	0 (0.0%)
egy (Egypt)	207	17 (8.2%)	1 (0.5%)	189 (91.3%)	0 (0.0%)
mys (Malaysia)	326	17 (5.2%)	35 (10.7%)	274 (84.0%)	0 (0.0%)
idn (Indonesia)	88	16 (18.2%)	1 (1.1%)	69 (78.4%)	2 (2.3%)
deu (Germany)	2032	15 (0.7%)	202 (9.9%)	1813 (89.2%)	2 (0.1%)
tha (Thailand)	412	15 (3.6%)	17 (4.1%)	380 (92.2%)	0 (0.0%)
sau (Saudi Arabia)	115	14 (12.2%)	1 (0.9%)	100 (87.0%)	0 (0.0%)
fra (France)	422	12 (2.8%)	54 (12.8%)	356 (84.4%)	0 (0.0%)
swe (Sweden)	345	12 (3.5%)	55 (15.9%)	277 (80.3%)	1 (0.3%)
nld (Netherlands)	684	11 (1.6%)	201 (29.4%)	471 (68.9%)	1 (0.1%)
rus (Russian Federation)	196	11 (5.6%)	14 (7.1%)	171 (87.2%)	0 (0.0%)
arg (Argentina)	153	10 (6.5%)	11 (7.2%)	132 (86.3%)	0 (0.0%)
cri (Costa Rica)	73	10 (13.7%)	0 (0.0%)	63 (86.3%)	0 (0.0%)
cze (Czech Republic)	116	9 (7.8%)	14 (12.1%)	93 (80.2%)	0 (0.0%)
isl (Iceland)	53	9 (17.0%)	4 (7.5%)	40 (75.5%)	0 (0.0%)
phl (Philippines)	128	9 (7.0%)	0 (0.0%)	119 (93.0%)	0 (0.0%)
rou (Romania)	121	9 (7.4%)	11 (9.1%)	101 (83.5%)	0 (0.0%)
alb (Albania)	11	7 (63.6%)	0 (0.0%)	4 (36.4%)	0 (0.0%)
chl (Chile)	104	7 (6.7%)	3 (2.9%)	94 (90.4%)	0 (0.0%)
lva (Latvia)	49	7 (14.3%)	0 (0.0%)	42 (85.7%)	0 (0.0%)
nzl (New Zealand)	253	7 (2.8%)	21 (8.3%)	225 (88.9%)	0 (0.0%)
che (Switzerland)	142	6 (4.2%)	46 (32.4%)	89 (62.7%)	1 (0.7%)
grd (Grenada)	11	6 (54.5%)	0 (0.0%)	5 (45.5%)	0 (0.0%)
jam (Jamaica)	22	6 (27.3%)	0 (0.0%)	16 (72.7%)	0 (0.0%)
ken (Kenya)	69	6 (8.7%)	1 (1.4%)	62 (89.9%)	0 (0.0%)
mdv (Maldives)	50	6 (12.0%)	0 (0.0%)	44 (88.0%)	0 (0.0%)
sen (Senegal)	12	6 (50.0%)	0 (0.0%)	6 (50.0%)	0 (0.0%)
civ (Ivory Coast (Cote D'Ivoire))	20	5 (25.0%)	0 (0.0%)	15 (75.0%)	0 (0.0%)
khm (Cambodia, Kingdom of)	31	5 (16.1%)	0 (0.0%)	26 (83.9%)	0 (0.0%)
bel (Belgium)	103	4 (3.9%)	16 (15.5%)	83 (80.6%)	0 (0.0%)
col (Colombia)	23	4 (17.4%)	0 (0.0%)	19 (82.6%)	0 (0.0%)
hti (Haiti)	85	4 (4.7%)	0 (0.0%)	81 (95.3%)	0 (0.0%)
irn (Iran)	99	4 (4.0%)	5 (5.1%)	90 (90.9%)	0 (0.0%)
pak (Pakistan)	324	4 (1.2%)	0 (0.0%)	320 (98.8%)	0 (0.0%)
tur (Turkey)	290	4 (1.4%)	1 (0.3%)	285 (98.3%)	0 (0.0%)
dnk (Denmark)	139	3 (2.2%)	14 (10.1%)	122 (87.8%)	0 (0.0%)
ecu (Ecuador)	29	3 (10.3%)	0 (0.0%)	26 (89.7%)	0 (0.0%)
fji (Fiji)	44	3 (6.8%)	0 (0.0%)	41 (93.2%)	0 (0.0%)
gha (Ghana)	39	3 (7.7%)	1 (2.6%)	35 (89.7%)	0 (0.0%)
irl (Ireland)	186	3 (1.6%)	10 (5.4%)	172 (92.5%)	1 (0.5%)
irq (Iraq)	11	3 (27.3%)	0 (0.0%)	8 (72.7%)	0 (0.0%)
mkd (Macedonia)	8	3 (37.5%)	0 (0.0%)	5 (62.5%)	0 (0.0%)
mmr (Myanmar)	23	3 (13.0%)	0 (0.0%)	20 (87.0%)	0 (0.0%)
nor (Norway)	89	3 (3.4%)	19 (21.3%)	67 (75.3%)	0 (0.0%)
pri (Puerto Rico)	19	3 (15.8%)	0 (0.0%)	16 (84.2%)	0 (0.0%)
tza (Tanzania)	39	3 (7.7%)	0 (0.0%)	36 (92.3%)	0 (0.0%)
ago (Angola)	2	2 (100.0%)	0 (0.0%)	0 (0.0%)	0 (0.0%)
aut (Austria)	174	2 (1.1%)	11 (6.3%)	161 (92.5%)	0 (0.0%)
btn (Bhutan)	5	2 (40.0%)	1 (20.0%)	2 (40.0%)	0 (0.0%)
chn (China)	204	2 (1.0%)	8 (3.9%)	194 (95.1%)	0 (0.0%)
esp (Spain)	291	2 (0.7%)	11 (3.8%)	278 (95.5%)	0 (0.0%)
hun (Hungary)	79	2 (2.5%)	5 (6.3%)	72 (91.1%)	0 (0.0%)
npl (Nepal)	78	2 (2.6%)	0 (0.0%)	76 (97.4%)	0 (0.0%)
pan (Panama)	28	2 (7.1%)	0 (0.0%)	26 (92.9%)	0 (0.0%)
sdn (Sudan)	3	2 (66.7%)	0 (0.0%)	1 (33.3%)	0 (0.0%)
sgp (Singapore)	99	2 (2.0%)	12 (12.1%)	85 (85.9%)	0 (0.0%)
srb (Serbia)	137	2 (1.5%)	11 (8.0%)	124 (90.5%)	0 (0.0%)
aze (Azerbaijan)	16	1 (6.3%)	0 (0.0%)	15 (93.8%)	0 (0.0%)
bmu (Bermuda)	10	1 (10.0%)	0 (0.0%)	9 (90.0%)	0 (0.0%)
cuw (Curaçao)	6	1 (16.7%)	0 (0.0%)	5 (83.3%)	0 (0.0%)
cym (Cayman Islands)	1	1 (100.0%)	0 (0.0%)	0 (0.0%)	0 (0.0%)
cyp (Cyprus)	5	1 (20.0%)	0 (0.0%)	4 (80.0%)	0 (0.0%)
fin (Finland)	81	1 (1.2%)	9 (11.1%)	71 (87.7%)	0 (0.0%)
grc (Greece)	148	1 (0.7%)	18 (12.2%)	129 (87.2%)	0 (0.0%)
gum (Guam [US])	8	1 (12.5%)	2 (25.0%)	5 (62.5%)	0 (0.0%)
lbn (Lebanon)	8	1 (12.5%)	0 (0.0%)	7 (87.5%)	0 (0.0%)
lux (Luxembourg)	46	1 (2.2%)	4 (8.7%)	41 (89.1%)	0 (0.0%)
mda (Moldova, Republic of)	6	1 (16.7%)	1 (16.7%)	4 (66.7%)	0 (0.0%)
mng (Mongolia)	5	1 (20.0%)	0 (0.0%)	4 (80.0%)	0 (0.0%)
moz (Mozambique)	1	1 (100.0%)	0 (0.0%)	0 (0.0%)	0 (0.0%)
prt (Portugal)	361	1 (0.3%)	190 (52.6%)	170 (47.1%)	0 (0.0%)
slv (El Salvador)	2	1 (50.0%)	0 (0.0%)	1 (50.0%)	0 (0.0%)
svk (Slovak Republic)	35	1 (2.9%)	4 (11.4%)	30 (85.7%)	0 (0.0%)
tgo (Togo)	2	1 (50.0%)	0 (0.0%)	1 (50.0%)	0 (0.0%)
uga (Uganda)	3	1 (33.3%)	0 (0.0%)	2 (66.7%)	0 (0.0%)
ury (Uruguay)	470	1 (0.2%)	11 (2.3%)	457 (97.2%)	1 (0.2%)
ala (Åland Islands)	2	0 (0.0%)	0 (0.0%)	2 (100.0%)	0 (0.0%)
arm (Armenia)	5	0 (0.0%)	0 (0.0%)	5 (100.0%)	0 (0.0%)
atg (Antigua and Barbuda)	1	0 (0.0%)	0 (0.0%)	1 (100.0%)	0 (0.0%)
bdi (Burundi)	3	0 (0.0%)	0 (0.0%)	3 (100.0%)	0 (0.0%)
bgr (Bulgaria)	47	0 (0.0%)	4 (8.5%)	43 (91.5%)	0 (0.0%)
bhr (Bahrain)	13	0 (0.0%)	0 (0.0%)	13 (100.0%)	0 (0.0%)
bih (Bosnia and Herzegovina)	6	0 (0.0%)	0 (0.0%)	6 (100.0%)	0 (0.0%)
blr (Belarus)	2	0 (0.0%)	0 (0.0%)	2 (100.0%)	0 (0.0%)
blz (Belize)	11	0 (0.0%)	0 (0.0%)	11 (100.0%)	0 (0.0%)
bol (Bolivia)	3	0 (0.0%)	0 (0.0%)	3 (100.0%)	0 (0.0%)
dom (Dominican Republic)	64	0 (0.0%)	0 (0.0%)	64 (100.0%)	0 (0.0%)
dza (Algeria)	73	0 (0.0%)	0 (0.0%)	73 (100.0%)	0 (0.0%)
est (Estonia)	16	0 (0.0%)	3 (18.8%)	13 (81.3%)	0 (0.0%)
eth (Ethiopia)	9	0 (0.0%)	0 (0.0%)	9 (100.0%)	0 (0.0%)
geo (Georgia)	13	0 (0.0%)	0 (0.0%)	13 (100.0%)	0 (0.0%)
glp (Guadeloupe [French])	1	0 (0.0%)	0 (0.0%)	1 (100.0%)	0 (0.0%)
gtm (Guatemala)	6	0 (0.0%)	0 (0.0%)	6 (100.0%)	0 (0.0%)
hkg (Hong Kong)	23	0 (0.0%)	3 (13.0%)	20 (87.0%)	0 (0.0%)
hrv (Croatia)	95	0 (0.0%)	0 (0.0%)	95 (100.0%)	0 (0.0%)
jor (Jordan)	5	0 (0.0%)	0 (0.0%)	5 (100.0%)	0 (0.0%)
kgz (Kyrgyz Republic (Kyrgyzstan))	1	0 (0.0%)	0 (0.0%)	1 (100.0%)	0 (0.0%)
kwt (Kuwait)	17	0 (0.0%)	0 (0.0%)	17 (100.0%)	0 (0.0%)
lbr (Liberia)	2	0 (0.0%)	0 (0.0%)	2 (100.0%)	0 (0.0%)
lby (Libya)	2	0 (0.0%)	0 (0.0%)	2 (100.0%)	0 (0.0%)
lca (Saint Lucia)	2	0 (0.0%)	0 (0.0%)	2 (100.0%)	0 (0.0%)
lka (Sri Lanka)	33	0 (0.0%)	0 (0.0%)	33 (100.0%)	0 (0.0%)
ltu (Lithuania)	5	0 (0.0%)	0 (0.0%)	5 (100.0%)	0 (0.0%)
mar (Morocco)	104	0 (0.0%)	0 (0.0%)	104 (100.0%)	0 (0.0%)
mdg (Madagascar)	5	0 (0.0%)	0 (0.0%)	5 (100.0%)	0 (0.0%)
mex (Mexico)	43	0 (0.0%)	1 (2.3%)	42 (97.7%)	0 (0.0%)
mli (Mali)	4	0 (0.0%)	0 (0.0%)	4 (100.0%)	0 (0.0%)
mlt (Malta)	2	0 (0.0%)	0 (0.0%)	2 (100.0%)	0 (0.0%)
mne (Montenegro)	30	0 (0.0%)	0 (0.0%)	30 (100.0%)	0 (0.0%)
mrt (Mauritania)	2	0 (0.0%)	0 (0.0%)	2 (100.0%)	0 (0.0%)
mus (Mauritius)	47	0 (0.0%)	11 (23.4%)	36 (76.6%)	0 (0.0%)
mwi (Malawi)	1	0 (0.0%)	0 (0.0%)	1 (100.0%)	0 (0.0%)
nam (Namibia)	5	0 (0.0%)	0 (0.0%)	5 (100.0%)	0 (0.0%)
ncl (New Caledonia [French])	4	0 (0.0%)	1 (25.0%)	3 (75.0%)	0 (0.0%)
ner (Niger)	1	0 (0.0%)	0 (0.0%)	1 (100.0%)	0 (0.0%)
nga (Nigeria)	20	0 (0.0%)	0 (0.0%)	20 (100.0%)	0 (0.0%)
omn (Oman)	9	0 (0.0%)	0 (0.0%)	9 (100.0%)	0 (0.0%)
per (Peru)	15	0 (0.0%)	0 (0.0%)	15 (100.0%)	0 (0.0%)
pry (Paraguay)	1	0 (0.0%)	0 (0.0%)	1 (100.0%)	0 (0.0%)
pse (Palestinian Territory, Occupied)	9	0 (0.0%)	0 (0.0%)	9 (100.0%)	0 (0.0%)
qat (Qatar)	15	0 (0.0%)	0 (0.0%)	15 (100.0%)	0 (0.0%)
reu (Reunion [French])	32	0 (0.0%)	0 (0.0%)	32 (100.0%)	0 (0.0%)
smr (San Marino)	13	0 (0.0%)	0 (0.0%)	13 (100.0%)	0 (0.0%)
svn (Slovenia)	19	0 (0.0%)	4 (21.1%)	15 (78.9%)	0 (0.0%)
sxm (Sint Maarten)	4	0 (0.0%)	0 (0.0%)	4 (100.0%)	0 (0.0%)
syc (Seychelles)	1	0 (0.0%)	1 (100.0%)	0 (0.0%)	0 (0.0%)
tca (Turks and Caicos Islands)	1	0 (0.0%)	0 (0.0%)	1 (100.0%)	0 (0.0%)
tto (Trinidad and Tobago)	17	0 (0.0%)	1 (5.9%)	16 (94.1%)	0 (0.0%)
tun (Tunisia)	104	0 (0.0%)	28 (26.9%)	76 (73.1%)	0 (0.0%)
twn (Taiwan)	110	0 (0.0%)	6 (5.5%)	104 (94.5%)	0 (0.0%)
ukr (Ukraine)	19	0 (0.0%)	4 (21.1%)	15 (78.9%)	0 (0.0%)
ven (Venezuela)	134	0 (0.0%)	59 (44.0%)	75 (56.0%)	0 (0.0%)
vir (Virgin Islands [US])	1	0 (0.0%)	0 (0.0%)	1 (100.0%)	0 (0.0%)

Center for Applied Internet Data Analysis    |   Based at the University of California's San Diego Supercomputer Center

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